21102020220108 has 48 divisors (see below), whose sum is σ = 49810402776960. Its totient is φ = 6952538446464.

The previous prime is 21102020220019. The next prime is 21102020220109. The reversal of 21102020220108 is 80102202020112.

It is not an unprimeable number, because it can be changed into a prime (21102020220109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17980393 + ... + 19118016.

It is an arithmetic number, because the mean of its divisors is an integer number (1037716724520).

Almost surely, 2^{21102020220108} is an apocalyptic number.

It is an amenable number.

21102020220108 is an abundant number, since it is smaller than the sum of its proper divisors (28708382556852).

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

21102020220108 is a wasteful number, since it uses less digits than its factorization.

21102020220108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37098966 (or 37098964 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 21102020220108 in words is "twenty-one trillion, one hundred two billion, twenty million, two hundred twenty thousand, one hundred eight".