20021122110100 has 36 divisors (see below), whose sum is σ = 46001472334524. Its totient is φ = 7537363617280.

The previous prime is 20021122110091. The next prime is 20021122110113. The reversal of 20021122110100 is 101122112002.

It can be written as a sum of positive squares in 6 ways, for example, as 2280635536 + 20018841474564 = 47756^2 + 4474242^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5888563627 + ... + 5888567026.

It is an arithmetic number, because the mean of its divisors is an integer number (1277818675959).

Almost surely, 2^{20021122110100} is an apocalyptic number.

20021122110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021122110100 is an abundant number, since it is smaller than the sum of its proper divisors (25980350224424).

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

20021122110100 is a wasteful number, since it uses less digits than its factorization.

20021122110100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11777130684 (or 11777130677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021122110100 its reverse (101122112002), we get a palindrome (20122244222102).

The spelling of 20021122110100 in words is "twenty trillion, twenty-one billion, one hundred twenty-two million, one hundred ten thousand, one hundred".