20211322331 has 4 divisors (see below), whose sum is σ = 20248682064. Its totient is φ = 20173962600.

The previous prime is 20211322303. The next prime is 20211322357. The reversal of 20211322331 is 13322311202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13322311202 = 2 ⋅6661155601.

It is a cyclic number.

It is not a de Polignac number, because 20211322331 - 2¹⁸ = 20211060187 is a prime.

It is a super-2 number, since 2×20211322331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211322531) 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, 18679055 + ... + 18680136.

It is an arithmetic number, because the mean of its divisors is an integer number (5062170516).

Almost surely, 2^20211322331 is an apocalyptic number.

20211322331 is a deficient number, since it is larger than the sum of its proper divisors (37359733).

20211322331 is an equidigital number, since it uses as much as digits as its factorization.

20211322331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37359732.

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

Adding to 20211322331 its reverse (13322311202), we get a palindrome (33533633533).

The spelling of 20211322331 in words is "twenty billion, two hundred eleven million, three hundred twenty-two thousand, three hundred thirty-one".