111012122121 has 8 divisors (see below), whose sum is σ = 148605869664. Its totient is φ = 73713228000.

The previous prime is 111012122113. The next prime is 111012122141. The reversal of 111012122121 is 121221210111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111012122121 - 2³ = 111012122113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111012122121.

It is not an unprimeable number, because it can be changed into a prime (111012122141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73712476 + ... + 73713981.

It is an arithmetic number, because the mean of its divisors is an integer number (18575733708).

Almost surely, 2^111012122121 is an apocalyptic number.

It is an amenable number.

111012122121 is a deficient number, since it is larger than the sum of its proper divisors (37593747543).

111012122121 is a wasteful number, since it uses less digits than its factorization.

111012122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147426711.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111012122121 its reverse (121221210111), we get a palindrome (232233332232).

The spelling of 111012122121 in words is "one hundred eleven billion, twelve million, one hundred twenty-two thousand, one hundred twenty-one".