202013220121 has 4 divisors (see below), whose sum is σ = 202168258432. Its totient is φ = 201858181812.

The previous prime is 202013220077. The next prime is 202013220127. The reversal of 202013220121 is 121022310202.

It is a happy number.

202013220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 202013220121 - 2²³ = 202004831513 is a prime.

It is a super-2 number, since 2×202013220121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202013220095 and 202013220104.

It is not an unprimeable number, because it can be changed into a prime (202013220127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77517201 + ... + 77519806.

It is an arithmetic number, because the mean of its divisors is an integer number (50542064608).

Almost surely, 2^202013220121 is an apocalyptic number.

It is an amenable number.

202013220121 is a deficient number, since it is larger than the sum of its proper divisors (155038311).

202013220121 is a wasteful number, since it uses less digits than its factorization.

202013220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155038310.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202013220121 its reverse (121022310202), we get a palindrome (323035530323).

The spelling of 202013220121 in words is "two hundred two billion, thirteen million, two hundred twenty thousand, one hundred twenty-one".