20021322131213 has 8 divisors (see below), whose sum is σ = 21561458602656. Its totient is φ = 18481190626800.

The previous prime is 20021322131191. The next prime is 20021322131221. The reversal of 20021322131213 is 31213122312002.

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

It is a cyclic number.

It is not a de Polignac number, because 20021322131213 - 2⁶ = 20021322131149 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 (20021322136213) 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, 14942198 + ... + 16226888.

It is an arithmetic number, because the mean of its divisors is an integer number (2695182325332).

Almost surely, 2^{20021322131213} is an apocalyptic number.

It is an amenable number.

20021322131213 is a deficient number, since it is larger than the sum of its proper divisors (1540136471443).

20021322131213 is a wasteful number, since it uses less digits than its factorization.

20021322131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483515.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20021322131213 its reverse (31213122312002), we get a palindrome (51234444443215).

The spelling of 20021322131213 in words is "twenty trillion, twenty-one billion, three hundred twenty-two million, one hundred thirty-one thousand, two hundred thirteen".