121042511154 has 48 divisors (see below), whose sum is σ = 273248951040. Its totient is φ = 38681036640.

The previous prime is 121042511147. The next prime is 121042511173. The reversal of 121042511154 is 451115240121.

121042511154 is a `hidden beast` number, since 1 + 210 + 425 + 11 + 15 + 4 = 666.

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, 953949 + ... + 1073360.

It is an arithmetic number, because the mean of its divisors is an integer number (5692686480).

Almost surely, 2^121042511154 is an apocalyptic number.

121042511154 is an abundant number, since it is smaller than the sum of its proper divisors (152206439886).

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

121042511154 is a wasteful number, since it uses less digits than its factorization.

121042511154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027455 (or 2027452 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 121042511154 its reverse (451115240121), we get a palindrome (572157751275).

The spelling of 121042511154 in words is "one hundred twenty-one billion, forty-two million, five hundred eleven thousand, one hundred fifty-four".