21101030223231 has 32 divisors (see below), whose sum is σ = 32412425633280. Its totient is φ = 11960948957184.

The previous prime is 21101030223223. The next prime is 21101030223253. The reversal of 21101030223231 is 13232203010112.

It is not a de Polignac number, because 21101030223231 - 2³ = 21101030223223 is a prime.

It is a super-2 number, since 2×21101030223231² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21101030223198 and 21101030223207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101030223131) 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, 452671 + ... + 6512063.

It is an arithmetic number, because the mean of its divisors is an integer number (1012888301040).

Almost surely, 2^{21101030223231} is an apocalyptic number.

21101030223231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21101030223231 is a deficient number, since it is larger than the sum of its proper divisors (11311395410049).

21101030223231 is a wasteful number, since it uses less digits than its factorization.

21101030223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060735.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21101030223231 its reverse (13232203010112), we get a palindrome (34333233233343).

The spelling of 21101030223231 in words is "twenty-one trillion, one hundred one billion, thirty million, two hundred twenty-three thousand, two hundred thirty-one".