21210002100210 has 128 divisors (see below), whose sum is σ = 64815047368704. Its totient is φ = 4313501372160.

The previous prime is 21210002100193. The next prime is 21210002100223. The reversal of 21210002100210 is 1200120001212.

It is a super-2 number, since 2×21210002100210² (a number of 27 digits) contains 22 as substring.

21210002100210 is a modest number, since divided by 2100210 gives 212100 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97570357 + ... + 97787496.

It is an arithmetic number, because the mean of its divisors is an integer number (506367557568).

Almost surely, 2^{21210002100210} is an apocalyptic number.

21210002100210 is an abundant number, since it is smaller than the sum of its proper divisors (43605045268494).

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

21210002100210 is a wasteful number, since it uses less digits than its factorization.

21210002100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195357928.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21210002100210 its reverse (1200120001212), we get a palindrome (22410122101422).

The spelling of 21210002100210 in words is "twenty-one trillion, two hundred ten billion, two million, one hundred thousand, two hundred ten".