20001022213331 has 4 divisors (see below), whose sum is σ = 21053707593000. Its totient is φ = 18948336833664.

The previous prime is 20001022213307. The next prime is 20001022213439. The reversal of 20001022213331 is 13331222010002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001022213331 - 2²² = 20001018019027 is a prime.

It is a super-2 number, since 2×20001022213331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001022213631) 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, 526342689806 + ... + 526342689843.

It is an arithmetic number, because the mean of its divisors is an integer number (5263426898250).

Almost surely, 2^{20001022213331} is an apocalyptic number.

20001022213331 is a deficient number, since it is larger than the sum of its proper divisors (1052685379669).

20001022213331 is a wasteful number, since it uses less digits than its factorization.

20001022213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052685379668.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20001022213331 its reverse (13331222010002), we get a palindrome (33332244223333).

The spelling of 20001022213331 in words is "twenty trillion, one billion, twenty-two million, two hundred thirteen thousand, three hundred thirty-one".