121531130 has 64 divisors (see below), whose sum is σ = 268531200. Its totient is φ = 38651904.

The previous prime is 121531127. The next prime is 121531153. The reversal of 121531130 is 31135121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 121531099 and 121531108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86171 + ... + 87569.

It is an arithmetic number, because the mean of its divisors is an integer number (4195800).

Almost surely, 2^121531130 is an apocalyptic number.

121531130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121531130 is an abundant number, since it is smaller than the sum of its proper divisors (147000070).

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

121531130 is a wasteful number, since it uses less digits than its factorization.

121531130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 121531130 is about 11024.1158375627. The cubic root of 121531130 is about 495.3313837201.

Adding to 121531130 its reverse (31135121), we get a palindrome (152666251).

The spelling of 121531130 in words is "one hundred twenty-one million, five hundred thirty-one thousand, one hundred thirty".