121783413141954 has 48 divisors (see below), whose sum is σ = 265468087789632. Its totient is φ = 40347741780384.

The previous prime is 121783413141853. The next prime is 121783413141989. The reversal of 121783413141954 is 459141314387121.

121783413141954 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 83 + 413 + 141 + 9 + 5 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121783413141954.

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, 31519477 + ... + 35171639.

It is an arithmetic number, because the mean of its divisors is an integer number (5530585162284).

Almost surely, 2^{121783413141954} is an apocalyptic number.

121783413141954 is an abundant number, since it is smaller than the sum of its proper divisors (143684674647678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121783413141954 is a wasteful number, since it uses less digits than its factorization.

121783413141954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663431 (or 3663428 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 121783413141954 in words is "one hundred twenty-one trillion, seven hundred eighty-three billion, four hundred thirteen million, one hundred forty-one thousand, nine hundred fifty-four".