20021322131201 has 4 divisors (see below), whose sum is σ = 21075075927600. Its totient is φ = 18967568334804.

The previous prime is 20021322131191. The next prime is 20021322131221. The reversal of 20021322131201 is 10213122312002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20021322131201 - 2²⁶ = 20021255022337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021322131221) 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, 526876898171 + ... + 526876898208.

It is an arithmetic number, because the mean of its divisors is an integer number (5268768981900).

Almost surely, 2^{20021322131201} is an apocalyptic number.

It is an amenable number.

20021322131201 is a deficient number, since it is larger than the sum of its proper divisors (1053753796399).

20021322131201 is a wasteful number, since it uses less digits than its factorization.

20021322131201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053753796398.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20021322131201 its reverse (10213122312002), we get a palindrome (30234444443203).

The spelling of 20021322131201 in words is "twenty trillion, twenty-one billion, three hundred twenty-two million, one hundred thirty-one thousand, two hundred one".