122311111220 has 24 divisors (see below), whose sum is σ = 256870250784. Its totient is φ = 48921222176.

The previous prime is 122311111213. The next prime is 122311111277. The reversal of 122311111220 is 22111113221.

It is a happy number.

It is a congruent number.

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, 122567 + ... + 509553.

It is an arithmetic number, because the mean of its divisors is an integer number (10702927116).

Almost surely, 2^122311111220 is an apocalyptic number.

122311111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122311111220 is an abundant number, since it is smaller than the sum of its proper divisors (134559139564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122311111220 is a wasteful number, since it uses less digits than its factorization.

122311111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402799 (or 402797 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 122311111220 its reverse (22111113221), we get a palindrome (144422224441).

The spelling of 122311111220 in words is "one hundred twenty-two billion, three hundred eleven million, one hundred eleven thousand, two hundred twenty".