99901020013 has 4 divisors (see below), whose sum is σ = 105777550620. Its totient is φ = 94024489408.

The previous prime is 99901019987. The next prime is 99901020029. The reversal of 99901020013 is 31002010999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81697073929 + 18203946084 = 285827^2 + 134922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99901020013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99901020083) 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, 2938265278 + ... + 2938265311.

It is an arithmetic number, because the mean of its divisors is an integer number (26444387655).

Almost surely, 2^99901020013 is an apocalyptic number.

It is an amenable number.

99901020013 is a deficient number, since it is larger than the sum of its proper divisors (5876530607).

99901020013 is a wasteful number, since it uses less digits than its factorization.

99901020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876530606.

The product of its (nonzero) digits is 4374, while the sum is 34.

The spelling of 99901020013 in words is "ninety-nine billion, nine hundred one million, twenty thousand, thirteen".