20122030331221 has 96 divisors (see below), whose sum is σ = 28451062080000. Its totient is φ = 14015868991488.

The previous prime is 20122030331213. The next prime is 20122030331243. The reversal of 20122030331221 is 12213303022102.

It is not a de Polignac number, because 20122030331221 - 2³ = 20122030331213 is a prime.

It is a super-2 number, since 2×20122030331221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20122030331192 and 20122030331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122030331281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15635355 + ... + 16873303.

It is an arithmetic number, because the mean of its divisors is an integer number (296365230000).

Almost surely, 2^{20122030331221} is an apocalyptic number.

It is an amenable number.

20122030331221 is a deficient number, since it is larger than the sum of its proper divisors (8329031748779).

20122030331221 is a wasteful number, since it uses less digits than its factorization.

20122030331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238091 (or 1238084 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20122030331221 its reverse (12213303022102), we get a palindrome (32335333353323).

The spelling of 20122030331221 in words is "twenty trillion, one hundred twenty-two billion, thirty million, three hundred thirty-one thousand, two hundred twenty-one".