121213213120 has 28 divisors (see below), whose sum is σ = 288638964504. Its totient is φ = 48485285120.

The previous prime is 121213213117. The next prime is 121213213127. The reversal of 121213213120 is 21312312121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213213127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189395326 + ... + 189395965.

Almost surely, 2^121213213120 is an apocalyptic number.

121213213120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121213213120 is an abundant number, since it is smaller than the sum of its proper divisors (167425751384).

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

121213213120 is an equidigital number, since it uses as much as digits as its factorization.

121213213120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378791308 (or 378791298 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121213213120 its reverse (21312312121), we get a palindrome (142525525241).

Subtracting from 121213213120 its reverse (21312312121), we obtain a palindrome (99900900999).

The spelling of 121213213120 in words is "one hundred twenty-one billion, two hundred thirteen million, two hundred thirteen thousand, one hundred twenty".