121038428551758 has 16 divisors (see below), whose sum is σ = 242080749698256. Its totient is φ = 40345494084800.

The previous prime is 121038428551741. The next prime is 121038428551763. The reversal of 121038428551758 is 857155824830121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161787141 + ... + 162533552.

It is an arithmetic number, because the mean of its divisors is an integer number (15130046856141).

Almost surely, 2^{121038428551758} is an apocalyptic number.

121038428551758 is an abundant number, since it is smaller than the sum of its proper divisors (121042321146498).

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

121038428551758 is a wasteful number, since it uses less digits than its factorization.

121038428551758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324382899.

The product of its (nonzero) digits is 21504000, while the sum is 60.

The spelling of 121038428551758 in words is "one hundred twenty-one trillion, thirty-eight billion, four hundred twenty-eight million, five hundred fifty-one thousand, seven hundred fifty-eight".