121557745134 has 48 divisors (see below), whose sum is σ = 301502822400. Its totient is φ = 34672781520.

The previous prime is 121557745117. The next prime is 121557745147. The reversal of 121557745134 is 431547755121.

121557745134 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 577 + 45 + 1 + 34 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 121557745134.

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, 729822 + ... + 880769.

It is an arithmetic number, because the mean of its divisors is an integer number (6281308800).

Almost surely, 2^121557745134 is an apocalyptic number.

121557745134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121557745134 is an abundant number, since it is smaller than the sum of its proper divisors (179945077266).

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

121557745134 is a wasteful number, since it uses less digits than its factorization.

121557745134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611205 (or 1611202 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The spelling of 121557745134 in words is "one hundred twenty-one billion, five hundred fifty-seven million, seven hundred forty-five thousand, one hundred thirty-four".