121131121110 has 32 divisors (see below), whose sum is σ = 290933862912. Its totient is φ = 32277279840.

The previous prime is 121131121093. The next prime is 121131121141. The reversal of 121131121110 is 11121131121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121131121110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1481556 + ... + 1561175.

It is an arithmetic number, because the mean of its divisors is an integer number (9091683216).

Almost surely, 2^121131121110 is an apocalyptic number.

121131121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121131121110 is an abundant number, since it is smaller than the sum of its proper divisors (169802741802).

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

121131121110 is a wasteful number, since it uses less digits than its factorization.

121131121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044068.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 121131121110 its reverse (11121131121), we get a palindrome (132252252231).

The spelling of 121131121110 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred twenty-one thousand, one hundred ten".