99999131021213 has 4 divisors (see below), whose sum is σ = 100557785384640. Its totient is φ = 99440476657788.

The previous prime is 99999131021203. The next prime is 99999131021429. The reversal of 99999131021213 is 31212013199999.

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 99999131021213 - 2⁴⁶ = 29630386843549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999131021203) 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, 279327181445 + ... + 279327181802.

It is an arithmetic number, because the mean of its divisors is an integer number (25139446346160).

Almost surely, 2^{99999131021213} is an apocalyptic number.

It is an amenable number.

99999131021213 is a deficient number, since it is larger than the sum of its proper divisors (558654363427).

99999131021213 is a wasteful number, since it uses less digits than its factorization.

99999131021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558654363426.

The product of its (nonzero) digits is 2125764, while the sum is 59.

The spelling of 99999131021213 in words is "ninety-nine trillion, nine hundred ninety-nine billion, one hundred thirty-one million, twenty-one thousand, two hundred thirteen".