200121202120 has 64 divisors (see below), whose sum is σ = 515955427200. Its totient is φ = 68431910400.

The previous prime is 200121202117. The next prime is 200121202129. The reversal of 200121202120 is 21202121002.

It is a happy number.

It is a super-3 number, since 3×200121202120³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200121202120.

It is not an unprimeable number, because it can be changed into a prime (200121202129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836781 + ... + 1049020.

It is an arithmetic number, because the mean of its divisors is an integer number (8061803550).

Almost surely, 2^200121202120 is an apocalyptic number.

200121202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121202120 is an abundant number, since it is smaller than the sum of its proper divisors (315834225080).

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

200121202120 is a wasteful number, since it uses less digits than its factorization.

200121202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886198 (or 1886194 counting only the distinct ones).

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

Adding to 200121202120 its reverse (21202121002), we get a palindrome (221323323122).

The spelling of 200121202120 in words is "two hundred billion, one hundred twenty-one million, two hundred two thousand, one hundred twenty".