111010121222121 has 96 divisors (see below), whose sum is σ = 194987103292800. Its totient is φ = 59981132759040.

The previous prime is 111010121222113. The next prime is 111010121222129. The reversal of 111010121222121 is 121222121010111.

It is a happy number.

111010121222121 is a `hidden beast` number, since 1 + 110 + 101 + 212 + 221 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (111010121222113) and next prime (111010121222129).

It is not a de Polignac number, because 111010121222121 - 2³ = 111010121222113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111010121222094 and 111010121222103.

It is not an unprimeable number, because it can be changed into a prime (111010121222129) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 262287745 + ... + 262710641.

It is an arithmetic number, because the mean of its divisors is an integer number (2031115659300).

Almost surely, 2^{111010121222121} is an apocalyptic number.

111010121222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111010121222121 is a deficient number, since it is larger than the sum of its proper divisors (83976982070679).

111010121222121 is a wasteful number, since it uses less digits than its factorization.

111010121222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431159 (or 431156 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111010121222121 its reverse (121222121010111), we get a palindrome (232232242232232).

The spelling of 111010121222121 in words is "one hundred eleven trillion, ten billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".