20102220122100 has 72 divisors (see below), whose sum is σ = 58181255119680. Its totient is φ = 5358856404480.

The previous prime is 20102220122057. The next prime is 20102220122359. The reversal of 20102220122100 is 122102220102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20102220122100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9919432 + ... + 11772831.

Almost surely, 2^{20102220122100} is an apocalyptic number.

20102220122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102220122100 is an abundant number, since it is smaller than the sum of its proper divisors (38079034997580).

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

20102220122100 is a wasteful number, since it uses less digits than its factorization.

20102220122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21695369 (or 21695362 counting only the distinct ones).

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

Adding to 20102220122100 its reverse (122102220102), we get a palindrome (20224322342202).

The spelling of 20102220122100 in words is "twenty trillion, one hundred two billion, two hundred twenty million, one hundred twenty-two thousand, one hundred".