120961265491 has 4 divisors (see below), whose sum is σ = 131957744184. Its totient is φ = 109964786800.

The previous prime is 120961265489. The next prime is 120961265507. The reversal of 120961265491 is 194562169021.

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

It is not a de Polignac number, because 120961265491 - 2¹ = 120961265489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120961265471) 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, 5498239330 + ... + 5498239351.

It is an arithmetic number, because the mean of its divisors is an integer number (32989436046).

Almost surely, 2^120961265491 is an apocalyptic number.

120961265491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120961265491 is a deficient number, since it is larger than the sum of its proper divisors (10996478693).

120961265491 is a wasteful number, since it uses less digits than its factorization.

120961265491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10996478692.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 120961265491 in words is "one hundred twenty billion, nine hundred sixty-one million, two hundred sixty-five thousand, four hundred ninety-one".