202055004121 has 4 divisors (see below), whose sum is σ = 202184611200. Its totient is φ = 201925397044.

The previous prime is 202055004113. The next prime is 202055004161. The reversal of 202055004121 is 121400550202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121400550202 = 2 ⋅60700275101.

It is a cyclic number.

It is not a de Polignac number, because 202055004121 - 2³ = 202055004113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202055004092 and 202055004101.

It is not an unprimeable number, because it can be changed into a prime (202055004101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64801201 + ... + 64804318.

It is an arithmetic number, because the mean of its divisors is an integer number (50546152800).

Almost surely, 2^202055004121 is an apocalyptic number.

It is an amenable number.

202055004121 is a deficient number, since it is larger than the sum of its proper divisors (129607079).

202055004121 is a wasteful number, since it uses less digits than its factorization.

202055004121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129607078.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 202055004121 its reverse (121400550202), we get a palindrome (323455554323).

The spelling of 202055004121 in words is "two hundred two billion, fifty-five million, four thousand, one hundred twenty-one".