200121200120 has 32 divisors (see below), whose sum is σ = 450307371600. Its totient is φ = 80042316288.

The previous prime is 200121200107. The next prime is 200121200159. The reversal of 200121200120 is 21002121002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352391 + ... + 724169.

Almost surely, 2^200121200120 is an apocalyptic number.

200121200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121200120 is an abundant number, since it is smaller than the sum of its proper divisors (250186171480).

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

200121200120 is a wasteful number, since it uses less digits than its factorization.

200121200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385247 (or 385243 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 200121200120 its reverse (21002121002), we get a palindrome (221123321122).

The spelling of 200121200120 in words is "two hundred billion, one hundred twenty-one million, two hundred thousand, one hundred twenty".