121131030120 has 64 divisors (see below), whose sum is σ = 371124875520. Its totient is φ = 31614338304.

The previous prime is 121131030107. The next prime is 121131030127. The reversal of 121131030120 is 21030131121.

It is a happy number.

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 121131030120.

It is not an unprimeable number, because it can be changed into a prime (121131030127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10732927 + ... + 10744206.

It is an arithmetic number, because the mean of its divisors is an integer number (5798826180).

Almost surely, 2^121131030120 is an apocalyptic number.

121131030120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121131030120 is an abundant number, since it is smaller than the sum of its proper divisors (249993845400).

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

121131030120 is a wasteful number, since it uses less digits than its factorization.

121131030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21477194 (or 21477190 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 121131030120 its reverse (21030131121), we get a palindrome (142161161241).

The spelling of 121131030120 in words is "one hundred twenty-one billion, one hundred thirty-one million, thirty thousand, one hundred twenty".