111122002121 has 16 divisors (see below), whose sum is σ = 120496249104. Its totient is φ = 101866512384.

The previous prime is 111122002109. The next prime is 111122002139. The reversal of 111122002121 is 121200221111.

It can be written as a sum of positive squares in 8 ways, for example, as 16526388025 + 94595614096 = 128555^2 + 307564^2 .

It is not a de Polignac number, because 111122002121 - 2²² = 111117807817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111122002096 and 111122002105.

It is not an unprimeable number, because it can be changed into a prime (111122002181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4103201 + ... + 4130193.

It is an arithmetic number, because the mean of its divisors is an integer number (7531015569).

Almost surely, 2^111122002121 is an apocalyptic number.

It is an amenable number.

111122002121 is a deficient number, since it is larger than the sum of its proper divisors (9374246983).

111122002121 is a wasteful number, since it uses less digits than its factorization.

111122002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29180.

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

Adding to 111122002121 its reverse (121200221111), we get a palindrome (232322223232).

The spelling of 111122002121 in words is "one hundred eleven billion, one hundred twenty-two million, two thousand, one hundred twenty-one".