121041204155 has 4 divisors (see below), whose sum is σ = 145249444992. Its totient is φ = 96832963320.

The previous prime is 121041204113. The next prime is 121041204169. The reversal of 121041204155 is 551402140121.

It is a happy number.

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

It is not a de Polignac number, because 121041204155 - 2³⁰ = 119967462331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12104120411 + ... + 12104120420.

It is an arithmetic number, because the mean of its divisors is an integer number (36312361248).

Almost surely, 2^121041204155 is an apocalyptic number.

121041204155 is a deficient number, since it is larger than the sum of its proper divisors (24208240837).

121041204155 is an equidigital number, since it uses as much as digits as its factorization.

121041204155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24208240836.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 121041204155 its reverse (551402140121), we get a palindrome (672443344276).

The spelling of 121041204155 in words is "one hundred twenty-one billion, forty-one million, two hundred four thousand, one hundred fifty-five".