20100021221022 has 64 divisors (see below), whose sum is σ = 42419641006080. Its totient is φ = 6331812585696.

The previous prime is 20100021220997. The next prime is 20100021221023. The reversal of 20100021221022 is 22012212000102.

It is a junction number, because it is equal to n+sod(n) for n = 20100021220992 and 20100021221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100021221023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176000983 + ... + 176115149.

It is an arithmetic number, because the mean of its divisors is an integer number (662806890720).

Almost surely, 2^{20100021221022} is an apocalyptic number.

20100021221022 is an abundant number, since it is smaller than the sum of its proper divisors (22319619785058).

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

20100021221022 is a wasteful number, since it uses less digits than its factorization.

20100021221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117965.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20100021221022 its reverse (22012212000102), we get a palindrome (42112233221124).

The spelling of 20100021221022 in words is "twenty trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand, twenty-two".