121212112302 has 24 divisors (see below), whose sum is σ = 276448677960. Its totient is φ = 38277509040.

The previous prime is 121212112291. The next prime is 121212112339. The reversal of 121212112302 is 203211212121.

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

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 177210349 + ... + 177211032.

It is an arithmetic number, because the mean of its divisors is an integer number (11518694915).

Almost surely, 2^121212112302 is an apocalyptic number.

121212112302 is an abundant number, since it is smaller than the sum of its proper divisors (155236565658).

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

121212112302 is a wasteful number, since it uses less digits than its factorization.

121212112302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354421408 (or 354421405 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121212112302 its reverse (203211212121), we get a palindrome (324423324423).

The spelling of 121212112302 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, three hundred two".