121400305154 has 4 divisors (see below), whose sum is σ = 182100457734. Its totient is φ = 60700152576.

The previous prime is 121400305153. The next prime is 121400305171. The reversal of 121400305154 is 451503004121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 119131974025 + 2268331129 = 345155^2 + 47627^2 .

It is not an unprimeable number, because it can be changed into a prime (121400305153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30350076287 + ... + 30350076290.

Almost surely, 2^121400305154 is an apocalyptic number.

121400305154 is a deficient number, since it is larger than the sum of its proper divisors (60700152580).

121400305154 is an equidigital number, since it uses as much as digits as its factorization.

121400305154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60700152579.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 121400305154 its reverse (451503004121), we get a palindrome (572903309275).

The spelling of 121400305154 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, one hundred fifty-four".