121155231104 has 16 divisors (see below), whose sum is σ = 241363937220. Its totient is φ = 60577615488.

The previous prime is 121155231103. The next prime is 121155231137. The reversal of 121155231104 is 401132551121.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121155231103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473262494 + ... + 473262749.

Almost surely, 2^121155231104 is an apocalyptic number.

It is an amenable number.

121155231104 is a deficient number, since it is larger than the sum of its proper divisors (120208706116).

121155231104 is an frugal number, since it uses more digits than its factorization.

121155231104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946525257 (or 946525245 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 121155231104 its reverse (401132551121), we get a palindrome (522287782225).

The spelling of 121155231104 in words is "one hundred twenty-one billion, one hundred fifty-five million, two hundred thirty-one thousand, one hundred four".