221121120122120 has 32 divisors (see below), whose sum is σ = 519153934201920. Its totient is φ = 84602863350720.

The previous prime is 221121120122113. The next prime is 221121120122137. The reversal of 221121120122120 is 21221021121122.

It is a super-2 number, since 2×221121120122120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221121120122092 and 221121120122101.

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, 120174520886 + ... + 120174522725.

It is an arithmetic number, because the mean of its divisors is an integer number (16223560443810).

Almost surely, 2^{221121120122120} is an apocalyptic number.

221121120122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221121120122120 is an abundant number, since it is smaller than the sum of its proper divisors (298032814079800).

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

221121120122120 is a wasteful number, since it uses less digits than its factorization.

221121120122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240349043645 (or 240349043641 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221121120122120 its reverse (21221021121122), we get a palindrome (242342141243242).

The spelling of 221121120122120 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, one hundred twenty".