111120001220021 has 4 divisors (see below), whose sum is σ = 111169630521600. Its totient is φ = 111070371918444.

The previous prime is 111120001220009. The next prime is 111120001220023. The reversal of 111120001220021 is 120022100021111.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111120001220021 is a prime.

It is a super-2 number, since 2×111120001220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111120001219978 and 111120001220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120001220023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24814647431 + ... + 24814651908.

It is an arithmetic number, because the mean of its divisors is an integer number (27792407630400).

Almost surely, 2^{111120001220021} is an apocalyptic number.

It is an amenable number.

111120001220021 is a deficient number, since it is larger than the sum of its proper divisors (49629301579).

111120001220021 is an equidigital number, since it uses as much as digits as its factorization.

111120001220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49629301578.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111120001220021 its reverse (120022100021111), we get a palindrome (231142101241132).

The spelling of 111120001220021 in words is "one hundred eleven trillion, one hundred twenty billion, one million, two hundred twenty thousand, twenty-one".