10221312231 has 48 divisors (see below), whose sum is σ = 16086042336. Its totient is φ = 6216818688.

The previous prime is 10221312209. The next prime is 10221312253. The reversal of 10221312231 is 13221312201.

10221312231 is a `hidden beast` number, since 102 + 21 + 312 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (10221312209) and next prime (10221312253).

It is not a de Polignac number, because 10221312231 - 2⁷ = 10221312103 is a prime.

It is a super-2 number, since 2×10221312231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221312331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3679315 + ... + 3682091.

It is an arithmetic number, because the mean of its divisors is an integer number (335125882).

Almost surely, 2^10221312231 is an apocalyptic number.

10221312231 is a deficient number, since it is larger than the sum of its proper divisors (5864730105).

10221312231 is a wasteful number, since it uses less digits than its factorization.

10221312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152 (or 3149 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 10221312231 its reverse (13221312201), we get a palindrome (23442624432).

The spelling of 10221312231 in words is "ten billion, two hundred twenty-one million, three hundred twelve thousand, two hundred thirty-one".