9499131611921 has 4 divisors (see below), whose sum is σ = 10856150413632. Its totient is φ = 8142112810212.

The previous prime is 9499131611917. The next prime is 9499131611923. The reversal of 9499131611921 is 1291161319949.

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 9499131611921 - 2² = 9499131611917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9499131611923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678509400845 + ... + 678509400858.

It is an arithmetic number, because the mean of its divisors is an integer number (2714037603408).

Almost surely, 2^{9499131611921} is an apocalyptic number.

It is an amenable number.

9499131611921 is a deficient number, since it is larger than the sum of its proper divisors (1357018801711).

9499131611921 is a wasteful number, since it uses less digits than its factorization.

9499131611921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357018801710.

The product of its digits is 944784, while the sum is 56.

The spelling of 9499131611921 in words is "nine trillion, four hundred ninety-nine billion, one hundred thirty-one million, six hundred eleven thousand, nine hundred twenty-one".