210002121012120 has 64 divisors (see below), whose sum is σ = 641893275565920. Its totient is φ = 54943951156224.

The previous prime is 210002121012119. The next prime is 210002121012191. The reversal of 210002121012120 is 21210121200012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 210002121012120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16509594349 + ... + 16509607068.

Almost surely, 2^{210002121012120} is an apocalyptic number.

210002121012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210002121012120 is an abundant number, since it is smaller than the sum of its proper divisors (431891154553800).

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

210002121012120 is a wasteful number, since it uses less digits than its factorization.

210002121012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33019201484 (or 33019201480 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210002121012120 its reverse (21210121200012), we get a palindrome (231212242212132).

The spelling of 210002121012120 in words is "two hundred ten trillion, two billion, one hundred twenty-one million, twelve thousand, one hundred twenty".