20211020331 has 8 divisors (see below), whose sum is σ = 27186505680. Its totient is φ = 13354774272.

The previous prime is 20211020303. The next prime is 20211020447. The reversal of 20211020331 is 13302011202.

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

It is not a de Polignac number, because 20211020331 - 2¹⁸ = 20210758187 is a prime.

It is a super-2 number, since 2×20211020331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20211020331.

It is not an unprimeable number, because it can be changed into a prime (20211520331) 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, 29809426 + ... + 29810103.

It is an arithmetic number, because the mean of its divisors is an integer number (3398313210).

Almost surely, 2^20211020331 is an apocalyptic number.

20211020331 is a deficient number, since it is larger than the sum of its proper divisors (6975485349).

20211020331 is a wasteful number, since it uses less digits than its factorization.

20211020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59619645.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20211020331 its reverse (13302011202), we get a palindrome (33513031533).

The spelling of 20211020331 in words is "twenty billion, two hundred eleven million, twenty thousand, three hundred thirty-one".