210200122120021 has 24 divisors (see below), whose sum is σ = 233337573941472. Its totient is φ = 189196134732000.

The previous prime is 210200122119979. The next prime is 210200122120039. The reversal of 210200122120021 is 120021221002012.

It is a happy number.

It is not a de Polignac number, because 210200122120021 - 2⁹ = 210200122119509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210200122119977 and 210200122120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210200122120061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1475773410 + ... + 1475915836.

It is an arithmetic number, because the mean of its divisors is an integer number (9722398914228).

Almost surely, 2^{210200122120021} is an apocalyptic number.

It is an amenable number.

210200122120021 is a deficient number, since it is larger than the sum of its proper divisors (23137451821451).

210200122120021 is a wasteful number, since it uses less digits than its factorization.

210200122120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263313 (or 263302 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210200122120021 its reverse (120021221002012), we get a palindrome (330221343122033).

The spelling of 210200122120021 in words is "two hundred ten trillion, two hundred billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".