20211030231 has 32 divisors (see below), whose sum is σ = 31161231360. Its totient is φ = 11413386336.

The previous prime is 20211030223. The next prime is 20211030239. The reversal of 20211030231 is 13203011202.

It is an interprime number because it is at equal distance from previous prime (20211030223) and next prime (20211030239).

It is not a de Polignac number, because 20211030231 - 2³ = 20211030223 is a prime.

It is a super-2 number, since 2×20211030231² (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 20211030231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211030239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 930760 + ... + 952226.

It is an arithmetic number, because the mean of its divisors is an integer number (973788480).

Almost surely, 2^20211030231 is an apocalyptic number.

20211030231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20211030231 is a deficient number, since it is larger than the sum of its proper divisors (10950201129).

20211030231 is a wasteful number, since it uses less digits than its factorization.

20211030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22003.

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

Adding to 20211030231 its reverse (13203011202), we get a palindrome (33414041433).

The spelling of 20211030231 in words is "twenty billion, two hundred eleven million, thirty thousand, two hundred thirty-one".