21023103310 has 32 divisors (see below), whose sum is σ = 43076593152. Its totient is φ = 7312382880.

The previous prime is 21023103281. The next prime is 21023103319. The reversal of 21023103310 is 1330132012.

It is a super-2 number, since 2×21023103310² (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 (21023103319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4152234 + ... + 4157293.

It is an arithmetic number, because the mean of its divisors is an integer number (1346143536).

Almost surely, 2^21023103310 is an apocalyptic number.

21023103310 is an abundant number, since it is smaller than the sum of its proper divisors (22053489842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023103310 is a wasteful number, since it uses less digits than its factorization.

21023103310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8309568.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21023103310 its reverse (1330132012), we get a palindrome (22353235322).

The spelling of 21023103310 in words is "twenty-one billion, twenty-three million, one hundred three thousand, three hundred ten".