121223213013 has 16 divisors (see below), whose sum is σ = 184738478720. Its totient is φ = 69263885376.

The previous prime is 121223212993. The next prime is 121223213051. The reversal of 121223213013 is 310312322121.

It is not a de Polignac number, because 121223213013 - 2¹⁴ = 121223196629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223213213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38758 + ... + 493911.

It is an arithmetic number, because the mean of its divisors is an integer number (11546154920).

Almost surely, 2^121223213013 is an apocalyptic number.

It is an amenable number.

121223213013 is a deficient number, since it is larger than the sum of its proper divisors (63515265707).

121223213013 is a wasteful number, since it uses less digits than its factorization.

121223213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543516.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121223213013 its reverse (310312322121), we get a palindrome (431535535134).

The spelling of 121223213013 in words is "one hundred twenty-one billion, two hundred twenty-three million, two hundred thirteen thousand, thirteen".