244142120991 has 4 divisors (see below), whose sum is σ = 325522827992. Its totient is φ = 162761413992.

The previous prime is 244142120987. The next prime is 244142121007. The reversal of 244142120991 is 199021241442.

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

It is not a de Polignac number, because 244142120991 - 2² = 244142120987 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 (244142120941) 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, 40690353496 + ... + 40690353501.

It is an arithmetic number, because the mean of its divisors is an integer number (81380706998).

Almost surely, 2^244142120991 is an apocalyptic number.

244142120991 is a deficient number, since it is larger than the sum of its proper divisors (81380707001).

244142120991 is an equidigital number, since it uses as much as digits as its factorization.

244142120991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81380707000.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 244142120991 in words is "two hundred forty-four billion, one hundred forty-two million, one hundred twenty thousand, nine hundred ninety-one".