201202122131 has 4 divisors (see below), whose sum is σ = 202365140352. Its totient is φ = 200039103912.

The previous prime is 201202122127. The next prime is 201202122139. The reversal of 201202122131 is 131221202102.

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

It is a cyclic number.

It is not a de Polignac number, because 201202122131 - 2² = 201202122127 is a prime.

It is a super-2 number, since 2×201202122131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201202122139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581508851 + ... + 581509196.

It is an arithmetic number, because the mean of its divisors is an integer number (50591285088).

Almost surely, 2^201202122131 is an apocalyptic number.

201202122131 is a deficient number, since it is larger than the sum of its proper divisors (1163018221).

201202122131 is a wasteful number, since it uses less digits than its factorization.

201202122131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163018220.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201202122131 its reverse (131221202102), we get a palindrome (332423324233).

The spelling of 201202122131 in words is "two hundred one billion, two hundred two million, one hundred twenty-two thousand, one hundred thirty-one".