22121202313213 has 8 divisors (see below), whose sum is σ = 22539234497976. Its totient is φ = 21703194240000.

The previous prime is 22121202313207. The next prime is 22121202313261. The reversal of 22121202313213 is 31231320212122.

It can be written as a sum of positive squares in 4 ways, for example, as 763661011129 + 21357541302084 = 873877^2 + 4621422^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121202313213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121202313513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4170288 + ... + 7850713.

It is an arithmetic number, because the mean of its divisors is an integer number (2817404312247).

Almost surely, 2^{22121202313213} is an apocalyptic number.

It is an amenable number.

22121202313213 is a deficient number, since it is larger than the sum of its proper divisors (418032184763).

22121202313213 is a wasteful number, since it uses less digits than its factorization.

22121202313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12055775.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 22121202313213 its reverse (31231320212122), we get a palindrome (53352522525335).

The spelling of 22121202313213 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred two million, three hundred thirteen thousand, two hundred thirteen".