131213222201 has 8 divisors (see below), whose sum is σ = 135742278600. Its totient is φ = 126684463360.

The previous prime is 131213222183. The next prime is 131213222249. The reversal of 131213222201 is 102222312131.

It can be written as a sum of positive squares in 4 ways, for example, as 67847746576 + 63365475625 = 260476^2 + 251725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131213222201 - 2³⁰ = 130139480377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131213242201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183535 + ... + 1289643.

It is an arithmetic number, because the mean of its divisors is an integer number (16967784825).

Almost surely, 2^131213222201 is an apocalyptic number.

It is an amenable number.

131213222201 is a deficient number, since it is larger than the sum of its proper divisors (4529056399).

131213222201 is a wasteful number, since it uses less digits than its factorization.

131213222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148779.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131213222201 its reverse (102222312131), we get a palindrome (233435534332).

The spelling of 131213222201 in words is "one hundred thirty-one billion, two hundred thirteen million, two hundred twenty-two thousand, two hundred one".