20121111122 has 64 divisors (see below), whose sum is σ = 36142467840. Its totient is φ = 8219232000.

The previous prime is 20121111121. The next prime is 20121111133. The reversal of 20121111122 is 22111112102.

It is a super-2 number, since 2×20121111122² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20121111097 and 20121111106.

It is not an unprimeable number, because it can be changed into a prime (20121111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22183793 + ... + 22184699.

It is an arithmetic number, because the mean of its divisors is an integer number (564726060).

Almost surely, 2^20121111122 is an apocalyptic number.

20121111122 is a deficient number, since it is larger than the sum of its proper divisors (16021356718).

20121111122 is a wasteful number, since it uses less digits than its factorization.

20121111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587.

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

Adding to 20121111122 its reverse (22111112102), we get a palindrome (42232223224).

The spelling of 20121111122 in words is "twenty billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty-two".