121557107459 has 8 divisors (see below), whose sum is σ = 124532296560. Its totient is φ = 118582412800.

The previous prime is 121557107453. The next prime is 121557107491. The reversal of 121557107459 is 954701755121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121557107459 - 2²⁸ = 121288672003 is a prime.

It is a super-2 number, since 2×121557107459² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121557107453) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 401012 + ... + 635550.

It is an arithmetic number, because the mean of its divisors is an integer number (15566537070).

Almost surely, 2^121557107459 is an apocalyptic number.

121557107459 is a deficient number, since it is larger than the sum of its proper divisors (2975189101).

121557107459 is a wasteful number, since it uses less digits than its factorization.

121557107459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247221.

The product of its (nonzero) digits is 441000, while the sum is 47.

The spelling of 121557107459 in words is "one hundred twenty-one billion, five hundred fifty-seven million, one hundred seven thousand, four hundred fifty-nine".