121223210013 has 32 divisors (see below), whose sum is σ = 181759336320. Its totient is φ = 79844849280.

The previous prime is 121223210011. The next prime is 121223210021. The reversal of 121223210013 is 310012322121.

It is not a de Polignac number, because 121223210013 - 2¹ = 121223210011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223210011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 702831 + ... + 858147.

It is an arithmetic number, because the mean of its divisors is an integer number (5679979260).

Almost surely, 2^121223210013 is an apocalyptic number.

It is an amenable number.

121223210013 is a deficient number, since it is larger than the sum of its proper divisors (60536126307).

121223210013 is a wasteful number, since it uses less digits than its factorization.

121223210013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155674 (or 155668 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121223210013 its reverse (310012322121), we get a palindrome (431235532134).

The spelling of 121223210013 in words is "one hundred twenty-one billion, two hundred twenty-three million, two hundred ten thousand, thirteen".