121127844645 has 24 divisors (see below), whose sum is σ = 211212158976. Its totient is φ = 64214677728.

The previous prime is 121127844589. The next prime is 121127844659. The reversal of 121127844645 is 546448721121.

121127844645 is a `hidden beast` number, since 1 + 2 + 112 + 78 + 4 + 464 + 5 = 666.

It is not a de Polignac number, because 121127844645 - 2⁶ = 121127844581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 121127844645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8051557 + ... + 8066586.

It is an arithmetic number, because the mean of its divisors is an integer number (8800506624).

Almost surely, 2^121127844645 is an apocalyptic number.

121127844645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121127844645 is a deficient number, since it is larger than the sum of its proper divisors (90084314331).

121127844645 is a wasteful number, since it uses less digits than its factorization.

121127844645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16118321 (or 16118318 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The spelling of 121127844645 in words is "one hundred twenty-one billion, one hundred twenty-seven million, eight hundred forty-four thousand, six hundred forty-five".