21102023211031 has 12 divisors (see below), whose sum is σ = 24581392354080. Its totient is φ = 18062292040800.

The previous prime is 21102023210999. The next prime is 21102023211037. The reversal of 21102023211031 is 13011232020112.

It is not a de Polignac number, because 21102023211031 - 2⁵ = 21102023210999 is a prime.

It is a super-2 number, since 2×21102023211031² (a number of 27 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 (21102023211037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299445670 + ... + 299516131.

It is an arithmetic number, because the mean of its divisors is an integer number (2048449362840).

Almost surely, 2^{21102023211031} is an apocalyptic number.

21102023211031 is a deficient number, since it is larger than the sum of its proper divisors (3479369143049).

21102023211031 is an equidigital number, since it uses as much as digits as its factorization.

21102023211031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598962534 (or 598962527 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21102023211031 its reverse (13011232020112), we get a palindrome (34113255231143).

The spelling of 21102023211031 in words is "twenty-one trillion, one hundred two billion, twenty-three million, two hundred eleven thousand, thirty-one".