210002120202100 has 18 divisors (see below), whose sum is σ = 455704600838774. Its totient is φ = 84000848080800.

The previous prime is 210002120202067. The next prime is 210002120202109. The reversal of 210002120202100 is 1202021200012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 219282412176 + 209782837789924 = 468276^2 + 14483882^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002120202109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1050010600911 + ... + 1050010601110.

Almost surely, 2^{210002120202100} is an apocalyptic number.

210002120202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210002120202100 is an abundant number, since it is smaller than the sum of its proper divisors (245702480636674).

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

210002120202100 is a wasteful number, since it uses less digits than its factorization.

210002120202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100021202035 (or 2100021202028 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210002120202100 its reverse (1202021200012), we get a palindrome (211204141402112).

The spelling of 210002120202100 in words is "two hundred ten trillion, two billion, one hundred twenty million, two hundred two thousand, one hundred".