121557058146 has 48 divisors (see below), whose sum is σ = 265216793400. Its totient is φ = 40235779584.

The previous prime is 121557058123. The next prime is 121557058151. The reversal of 121557058146 is 641850755121.

121557058146 is a `hidden beast` number, since 1 + 2 + 1 + 557 + 0 + 58 + 1 + 46 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 58561580025 + 62995478121 = 241995^2 + 250989^2 .

It is a super-2 number, since 2×121557058146² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4817050 + ... + 4842218.

Almost surely, 2^121557058146 is an apocalyptic number.

121557058146 is an abundant number, since it is smaller than the sum of its proper divisors (143659735254).

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

121557058146 is a wasteful number, since it uses less digits than its factorization.

121557058146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27043 (or 27040 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The spelling of 121557058146 in words is "one hundred twenty-one billion, five hundred fifty-seven million, fifty-eight thousand, one hundred forty-six".