121013223121013 has 4 divisors (see below), whose sum is σ = 121132683362028. Its totient is φ = 120893762880000.

The previous prime is 121013223121001. The next prime is 121013223121039. The reversal of 121013223121013 is 310121322310121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1392782346244 + 119620440774769 = 1180162^2 + 10937113^2 .

It is a cyclic number.

It is not a de Polignac number, because 121013223121013 - 2⁶ = 121013223120949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121013223121013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121013223121073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59730118988 + ... + 59730121013.

It is an arithmetic number, because the mean of its divisors is an integer number (30283170840507).

Almost surely, 2^{121013223121013} is an apocalyptic number.

It is an amenable number.

121013223121013 is a deficient number, since it is larger than the sum of its proper divisors (119460241015).

121013223121013 is a wasteful number, since it uses less digits than its factorization.

121013223121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119460241014.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121013223121013 its reverse (310121322310121), we get a palindrome (431134545431134).

The spelling of 121013223121013 in words is "one hundred twenty-one trillion, thirteen billion, two hundred twenty-three million, one hundred twenty-one thousand, thirteen".