111103021142021 has 4 divisors (see below), whose sum is σ = 111103768618752. Its totient is φ = 111102273665292.

The previous prime is 111103021141979. The next prime is 111103021142063. The reversal of 111103021142021 is 120241120301111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (111103021141979) and next prime (111103021142063).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111103021142021 is a prime.

It is a super-2 number, since 2×111103021142021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111103021141984 and 111103021142002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111103021142081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373515365 + ... + 373812698.

It is an arithmetic number, because the mean of its divisors is an integer number (27775942154688).

Almost surely, 2^{111103021142021} is an apocalyptic number.

It is an amenable number.

111103021142021 is a deficient number, since it is larger than the sum of its proper divisors (747476731).

111103021142021 is an equidigital number, since it uses as much as digits as its factorization.

111103021142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747476730.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 111103021142021 its reverse (120241120301111), we get a palindrome (231344141443132).

The spelling of 111103021142021 in words is "one hundred eleven trillion, one hundred three billion, twenty-one million, one hundred forty-two thousand, twenty-one".