122121111021220 has 48 divisors (see below), whose sum is σ = 256748839522560. Its totient is φ = 48792369367296.

The previous prime is 122121111021211. The next prime is 122121111021307. The reversal of 122121111021220 is 22120111121221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90948691 + ... + 92281669.

It is an arithmetic number, because the mean of its divisors is an integer number (5348934156720).

Almost surely, 2^{122121111021220} is an apocalyptic number.

122121111021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122121111021220 is an abundant number, since it is smaller than the sum of its proper divisors (134627728501340).

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

122121111021220 is a wasteful number, since it uses less digits than its factorization.

122121111021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338244 (or 1338242 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 122121111021220 its reverse (22120111121221), we get a palindrome (144241222142441).

The spelling of 122121111021220 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, two hundred twenty".