21010022231 has 8 divisors (see below), whose sum is σ = 22929776784. Its totient is φ = 19091893120.

The previous prime is 21010022213. The next prime is 21010022269. The reversal of 21010022231 is 13222001012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21010022231 - 2¹⁸ = 21009760087 is a prime.

It is a super-2 number, since 2×21010022231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010022291) 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, 379250 + ... + 431103.

It is an arithmetic number, because the mean of its divisors is an integer number (2866222098).

Almost surely, 2^21010022231 is an apocalyptic number.

21010022231 is a deficient number, since it is larger than the sum of its proper divisors (1919754553).

21010022231 is a wasteful number, since it uses less digits than its factorization.

21010022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812721.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21010022231 its reverse (13222001012), we get a palindrome (34232023243).

The spelling of 21010022231 in words is "twenty-one billion, ten million, twenty-two thousand, two hundred thirty-one".