21010031023311 has 24 divisors (see below), whose sum is σ = 33248804496336. Its totient is φ = 12678702541440.

The previous prime is 21010031023301. The next prime is 21010031023351. The reversal of 21010031023311 is 11332013001012.

21010031023311 is a `hidden beast` number, since 2 + 10 + 10 + 0 + 310 + 2 + 331 + 1 = 666.

It is not a de Polignac number, because 21010031023311 - 2⁷ = 21010031023183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010031023301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 455390100 + ... + 455436233.

It is an arithmetic number, because the mean of its divisors is an integer number (1385366854014).

Almost surely, 2^{21010031023311} is an apocalyptic number.

21010031023311 is a deficient number, since it is larger than the sum of its proper divisors (12238773473025).

21010031023311 is a wasteful number, since it uses less digits than its factorization.

21010031023311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910826583 (or 910826580 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21010031023311 its reverse (11332013001012), we get a palindrome (32342044024323).

The spelling of 21010031023311 in words is "twenty-one trillion, ten billion, thirty-one million, twenty-three thousand, three hundred eleven".