121222221022013 has 4 divisors (see below), whose sum is σ = 121254694162908. Its totient is φ = 121189747881120.

The previous prime is 121222221021997. The next prime is 121222221022103. The reversal of 121222221022013 is 310220122222121.

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 98148589558009 + 23073631464004 = 9906997^2 + 4803502^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222221022013 - 2⁴ = 121222221021997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121222221022013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222221024013) 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, 16236564848 + ... + 16236572313.

It is an arithmetic number, because the mean of its divisors is an integer number (30313673540727).

Almost surely, 2^{121222221022013} is an apocalyptic number.

It is an amenable number.

121222221022013 is a deficient number, since it is larger than the sum of its proper divisors (32473140895).

121222221022013 is an equidigital number, since it uses as much as digits as its factorization.

121222221022013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32473140894.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121222221022013 its reverse (310220122222121), we get a palindrome (431442343244134).

The spelling of 121222221022013 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, twenty-two thousand, thirteen".