2499131611921 has 8 divisors (see below), whose sum is σ = 2856165905664. Its totient is φ = 2142101191200.

The previous prime is 2499131611913. The next prime is 2499131611931. The reversal of 2499131611921 is 1291161319942.

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 2499131611921 - 2³ = 2499131611913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2499131611931) 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, 579381 + ... + 2309533.

It is an arithmetic number, because the mean of its divisors is an integer number (357020738208).

Almost surely, 2^{2499131611921} is an apocalyptic number.

It is an amenable number.

2499131611921 is a deficient number, since it is larger than the sum of its proper divisors (357034293743).

2499131611921 is a wasteful number, since it uses less digits than its factorization.

2499131611921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936511.

The product of its digits is 209952, while the sum is 49.

The spelling of 2499131611921 in words is "two trillion, four hundred ninety-nine billion, one hundred thirty-one million, six hundred eleven thousand, nine hundred twenty-one".