21201022200102 has 64 divisors (see below), whose sum is σ = 44175300480000. Its totient is φ = 6774956279168.

The previous prime is 21201022200089. The next prime is 21201022200103. The reversal of 21201022200102 is 20100222010212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201022200103) 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, 68887399 + ... + 69194477.

It is an arithmetic number, because the mean of its divisors is an integer number (690239070000).

Almost surely, 2^{21201022200102} is an apocalyptic number.

21201022200102 is an abundant number, since it is smaller than the sum of its proper divisors (22974278279898).

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

21201022200102 is a wasteful number, since it uses less digits than its factorization.

21201022200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309925.

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

Adding to 21201022200102 its reverse (20100222010212), we get a palindrome (41301244210314).

The spelling of 21201022200102 in words is "twenty-one trillion, two hundred one billion, twenty-two million, two hundred thousand, one hundred two".