200020202121 has 64 divisors (see below), whose sum is σ = 304041830400. Its totient is φ = 116282428416.

The previous prime is 200020202113. The next prime is 200020202143. The reversal of 200020202121 is 121202020002.

It is not a de Polignac number, because 200020202121 - 2³ = 200020202113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200020202097 and 200020202106.

It is not an unprimeable number, because it can be changed into a prime (200020202021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11663265 + ... + 11680401.

It is an arithmetic number, because the mean of its divisors is an integer number (4750653600).

Almost surely, 2^200020202121 is an apocalyptic number.

It is an amenable number.

200020202121 is a deficient number, since it is larger than the sum of its proper divisors (104021628279).

200020202121 is a wasteful number, since it uses less digits than its factorization.

200020202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17518.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 200020202121 its reverse (121202020002), we get a palindrome (321222222123).

The spelling of 200020202121 in words is "two hundred billion, twenty million, two hundred two thousand, one hundred twenty-one".