131213201001 has 4 divisors (see below), whose sum is σ = 174950934672. Its totient is φ = 87475467332.

The previous prime is 131213200999. The next prime is 131213201017. The reversal of 131213201001 is 100102312131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131213201001 - 2¹ = 131213200999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131213201051) 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, 21868866831 + ... + 21868866836.

It is an arithmetic number, because the mean of its divisors is an integer number (43737733668).

Almost surely, 2^131213201001 is an apocalyptic number.

It is an amenable number.

131213201001 is a deficient number, since it is larger than the sum of its proper divisors (43737733671).

131213201001 is an equidigital number, since it uses as much as digits as its factorization.

131213201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43737733670.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131213201001 its reverse (100102312131), we get a palindrome (231315513132).

The spelling of 131213201001 in words is "one hundred thirty-one billion, two hundred thirteen million, two hundred one thousand, one".