122111111121020 has 96 divisors (see below), whose sum is σ = 295343096057856. Its totient is φ = 41541547507200.

The previous prime is 122111111121011. The next prime is 122111111121059. The reversal of 122111111121020 is 20121111111221.

It is a super-2 number, since 2×122111111121020² (a number of 29 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 122111111121020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138633200 + ... + 139511240.

It is an arithmetic number, because the mean of its divisors is an integer number (3076490583936).

Almost surely, 2^{122111111121020} is an apocalyptic number.

122111111121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122111111121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147671548028928).

122111111121020 is an abundant number, since it is smaller than the sum of its proper divisors (173231984936836).

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

122111111121020 is a wasteful number, since it uses less digits than its factorization.

122111111121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885771 (or 885769 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 122111111121020 its reverse (20121111111221), we get a palindrome (142232222232241).

The spelling of 122111111121020 in words is "one hundred twenty-two trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty-one thousand, twenty".