201220233131 has 4 divisors (see below), whose sum is σ = 201494749872. Its totient is φ = 200945716392.

The previous prime is 201220233103. The next prime is 201220233139. The reversal of 201220233131 is 131332022102.

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 201220233131 - 2¹⁰ = 201220232107 is a prime.

It is a super-2 number, since 2×201220233131² (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 (201220233139) 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, 137257271 + ... + 137258736.

It is an arithmetic number, because the mean of its divisors is an integer number (50373687468).

Almost surely, 2^201220233131 is an apocalyptic number.

201220233131 is a deficient number, since it is larger than the sum of its proper divisors (274516741).

201220233131 is an equidigital number, since it uses as much as digits as its factorization.

201220233131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274516740.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 201220233131 its reverse (131332022102), we get a palindrome (332552255233).

The spelling of 201220233131 in words is "two hundred one billion, two hundred twenty million, two hundred thirty-three thousand, one hundred thirty-one".