202122131 has 4 divisors (see below), whose sum is σ = 202167792. Its totient is φ = 202076472.

The previous prime is 202122113. The next prime is 202122143. The reversal of 202122131 is 131221202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202122131 is a prime.

It is a super-2 number, since 2×202122131² = 81706711679962322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202122331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15380 + ... + 25313.

It is an arithmetic number, because the mean of its divisors is an integer number (50541948).

Almost surely, 2^202122131 is an apocalyptic number.

202122131 is a deficient number, since it is larger than the sum of its proper divisors (45661).

202122131 is an equidigital number, since it uses as much as digits as its factorization.

202122131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45660.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 202122131 is about 14216.9663079013. The cubic root of 202122131 is about 586.8646577273.

Adding to 202122131 its reverse (131221202), we get a palindrome (333343333).

The spelling of 202122131 in words is "two hundred two million, one hundred twenty-two thousand, one hundred thirty-one".