121121222013 has 12 divisors (see below), whose sum is σ = 190857683328. Its totient is φ = 73406801160.

The previous prime is 121121222009. The next prime is 121121222041. The reversal of 121121222013 is 310222121121.

It is not a de Polignac number, because 121121222013 - 2² = 121121222009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121222003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611723245 + ... + 611723442.

It is an arithmetic number, because the mean of its divisors is an integer number (15904806944).

Almost surely, 2^121121222013 is an apocalyptic number.

It is an amenable number.

121121222013 is a deficient number, since it is larger than the sum of its proper divisors (69736461315).

121121222013 is a wasteful number, since it uses less digits than its factorization.

121121222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223446704 (or 1223446701 counting only the distinct ones).

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

Adding to 121121222013 its reverse (310222121121), we get a palindrome (431343343134).

The spelling of 121121222013 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, thirteen".