121213121130 has 48 divisors (see below), whose sum is σ = 315243995040. Its totient is φ = 32314280544.

The previous prime is 121213121129. The next prime is 121213121143. The reversal of 121213121130 is 31121312121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128229 + ... + 508791.

It is an arithmetic number, because the mean of its divisors is an integer number (6567583230).

Almost surely, 2^121213121130 is an apocalyptic number.

121213121130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121213121130 is an abundant number, since it is smaller than the sum of its proper divisors (194030873910).

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

121213121130 is a wasteful number, since it uses less digits than its factorization.

121213121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384115 (or 384112 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121213121130 its reverse (31121312121), we get a palindrome (152334433251).

The spelling of 121213121130 in words is "one hundred twenty-one billion, two hundred thirteen million, one hundred twenty-one thousand, one hundred thirty".