121355406020058 has 32 divisors (see below), whose sum is σ = 278330487555456. Its totient is φ = 34554635352768.

The previous prime is 121355406019999. The next prime is 121355406020059. The reversal of 121355406020058 is 850020604553121.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (121355406020059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4930729041 + ... + 4930753652.

It is an arithmetic number, because the mean of its divisors is an integer number (8697827736108).

Almost surely, 2^{121355406020058} is an apocalyptic number.

121355406020058 is an abundant number, since it is smaller than the sum of its proper divisors (156975081535398).

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

121355406020058 is a wasteful number, since it uses less digits than its factorization.

121355406020058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9861482998.

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 121355406020058 in words is "one hundred twenty-one trillion, three hundred fifty-five billion, four hundred six million, twenty thousand, fifty-eight".