121312223130 has 64 divisors (see below), whose sum is σ = 334067908608. Its totient is φ = 27618024000.

The previous prime is 121312223077. The next prime is 121312223171. The reversal of 121312223130 is 31322213121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 121312223097 and 121312223106.

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, 1098042 + ... + 1203461.

It is an arithmetic number, because the mean of its divisors is an integer number (5219811072).

Almost surely, 2^121312223130 is an apocalyptic number.

121312223130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312223130 is an abundant number, since it is smaller than the sum of its proper divisors (212755685478).

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

121312223130 is a wasteful number, since it uses less digits than its factorization.

121312223130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301771.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121312223130 its reverse (31322213121), we get a palindrome (152634436251).

The spelling of 121312223130 in words is "one hundred twenty-one billion, three hundred twelve million, two hundred twenty-three thousand, one hundred thirty".