121751531130 has 64 divisors (see below), whose sum is σ = 294422688000. Its totient is φ = 32220902400.

The previous prime is 121751531129. The next prime is 121751531147. The reversal of 121751531130 is 31135157121.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 5357131 + ... + 5379809.

It is an arithmetic number, because the mean of its divisors is an integer number (4600354500).

Almost surely, 2^121751531130 is an apocalyptic number.

121751531130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121751531130 is an abundant number, since it is smaller than the sum of its proper divisors (172671156870).

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

121751531130 is a wasteful number, since it uses less digits than its factorization.

121751531130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24039.

The product of its (nonzero) digits is 3150, while the sum is 30.

Adding to 121751531130 its reverse (31135157121), we get a palindrome (152886688251).

The spelling of 121751531130 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred thirty-one thousand, one hundred thirty".