21102002201210 has 128 divisors (see below), whose sum is σ = 46350219561984. Its totient is φ = 6752299253760.

The previous prime is 21102002201173. The next prime is 21102002201213. The reversal of 21102002201210 is 1210220020112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21102002201213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71279654 + ... + 71575086.

It is an arithmetic number, because the mean of its divisors is an integer number (362111090328).

Almost surely, 2^{21102002201210} is an apocalyptic number.

21102002201210 is an abundant number, since it is smaller than the sum of its proper divisors (25248217360774).

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

21102002201210 is a wasteful number, since it uses less digits than its factorization.

21102002201210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295968.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21102002201210 its reverse (1210220020112), we get a palindrome (22312222221322).

The spelling of 21102002201210 in words is "twenty-one trillion, one hundred two billion, two million, two hundred one thousand, two hundred ten".