1291121874234 has 24 divisors (see below), whose sum is σ = 2799729403380. Its totient is φ = 430020315648.

The previous prime is 1291121874167. The next prime is 1291121874247. The reversal of 1291121874234 is 4324781211921.

1291121874234 is a `hidden beast` number, since 1 + 2 + 9 + 1 + 1 + 218 + 7 + 423 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1131319413225 + 159802461009 = 1063635^2 + 399753^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1291121874234.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29447689 + ... + 29491500.

Almost surely, 2^{1291121874234} is an apocalyptic number.

1291121874234 is an abundant number, since it is smaller than the sum of its proper divisors (1508607529146).

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

1291121874234 is a wasteful number, since it uses less digits than its factorization.

1291121874234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58940414 (or 58940411 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 1291121874234 in words is "one trillion, two hundred ninety-one billion, one hundred twenty-one million, eight hundred seventy-four thousand, two hundred thirty-four".