501111111122 has 16 divisors (see below), whose sum is σ = 784431672192. Its totient is φ = 239636216160.

The previous prime is 501111111097. The next prime is 501111111173. The reversal of 501111111122 is 221111111105.

It is a super-2 number, since 2×501111111122² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 501111111122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143723 + ... + 1011374.

It is an arithmetic number, because the mean of its divisors is an integer number (49026979512).

Almost surely, 2^501111111122 is an apocalyptic number.

501111111122 is a deficient number, since it is larger than the sum of its proper divisors (283320561070).

501111111122 is a wasteful number, since it uses less digits than its factorization.

501111111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164553.

The product of its (nonzero) digits is 20, while the sum is 17.

Subtracting from 501111111122 its sum of digits (17), we obtain a palindrome (501111111105).

Adding to 501111111122 its reverse (221111111105), we get a palindrome (722222222227).

The spelling of 501111111122 in words is "five hundred one billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty-two".