201220131213 has 12 divisors (see below), whose sum is σ = 291782242908. Its totient is φ = 133624780800.

The previous prime is 201220131209. The next prime is 201220131223. The reversal of 201220131213 is 312131022102.

201220131213 is a `hidden beast` number, since 201 + 220 + 1 + 31 + 213 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 199999467369 + 1220663844 = 447213^2 + 34938^2 .

It is not a de Polignac number, because 201220131213 - 2² = 201220131209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220131223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43495338 + ... + 43499963.

It is an arithmetic number, because the mean of its divisors is an integer number (24315186909).

Almost surely, 2^201220131213 is an apocalyptic number.

It is an amenable number.

201220131213 is a deficient number, since it is larger than the sum of its proper divisors (90562111695).

201220131213 is a wasteful number, since it uses less digits than its factorization.

201220131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86995564 (or 86995561 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201220131213 its reverse (312131022102), we get a palindrome (513351153315).

The spelling of 201220131213 in words is "two hundred one billion, two hundred twenty million, one hundred thirty-one thousand, two hundred thirteen".