121787844845 has 32 divisors (see below), whose sum is σ = 149693132160. Its totient is φ = 95086068480.

The previous prime is 121787844821. The next prime is 121787844877. The reversal of 121787844845 is 548448787121.

It is not a de Polignac number, because 121787844845 - 2¹² = 121787840749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47965586 + ... + 47968124.

It is an arithmetic number, because the mean of its divisors is an integer number (4677910380).

Almost surely, 2^121787844845 is an apocalyptic number.

It is an amenable number.

121787844845 is a deficient number, since it is larger than the sum of its proper divisors (27905287315).

121787844845 is a wasteful number, since it uses less digits than its factorization.

121787844845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485.

The product of its digits is 16056320, while the sum is 59.

The spelling of 121787844845 in words is "one hundred twenty-one billion, seven hundred eighty-seven million, eight hundred forty-four thousand, eight hundred forty-five".