111012101202121 has 4 divisors (see below), whose sum is σ = 126870972802432. Its totient is φ = 95153229601812.

The previous prime is 111012101202061. The next prime is 111012101202131. The reversal of 111012101202121 is 121202101210111.

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 not a de Polignac number, because 111012101202121 - 2¹⁹ = 111012100677833 is a prime.

It is a super-2 number, since 2×111012101202121² (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 = 111012101202095 and 111012101202104.

It is not an unprimeable number, because it can be changed into a prime (111012101202131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929435800145 + ... + 7929435800158.

It is an arithmetic number, because the mean of its divisors is an integer number (31717743200608).

Almost surely, 2^{111012101202121} is an apocalyptic number.

It is an amenable number.

111012101202121 is a deficient number, since it is larger than the sum of its proper divisors (15858871600311).

111012101202121 is an equidigital number, since it uses as much as digits as its factorization.

111012101202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15858871600310.

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

Adding to 111012101202121 its reverse (121202101210111), we get a palindrome (232214202412232).

The spelling of 111012101202121 in words is "one hundred eleven trillion, twelve billion, one hundred one million, two hundred two thousand, one hundred twenty-one".