121174451955 has 16 divisors (see below), whose sum is σ = 215421248160. Its totient is φ = 64626374304.

The previous prime is 121174451953. The next prime is 121174451969. The reversal of 121174451955 is 559154471121.

121174451955 is a `hidden beast` number, since 1 + 2 + 1 + 17 + 445 + 195 + 5 = 666.

It is not a de Polignac number, because 121174451955 - 2¹ = 121174451953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 121174451955.

It is not an unprimeable number, because it can be changed into a prime (121174451953) 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, 448794132 + ... + 448794401.

It is an arithmetic number, because the mean of its divisors is an integer number (13463828010).

Almost surely, 2^121174451955 is an apocalyptic number.

121174451955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121174451955 is a deficient number, since it is larger than the sum of its proper divisors (94246796205).

121174451955 is an equidigital number, since it uses as much as digits as its factorization.

121174451955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897588547 (or 897588541 counting only the distinct ones).

The product of its digits is 252000, while the sum is 45.

The spelling of 121174451955 in words is "one hundred twenty-one billion, one hundred seventy-four million, four hundred fifty-one thousand, nine hundred fifty-five".