21310123330 has 16 divisors (see below), whose sum is σ = 38360329344. Its totient is φ = 8523581040.

The previous prime is 21310123301. The next prime is 21310123399. The reversal of 21310123330 is 3332101312.

It is a junction number, because it is equal to n+sod(n) for n = 21310123298 and 21310123307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178165 + ... + 272695.

It is an arithmetic number, because the mean of its divisors is an integer number (2397520584).

Almost surely, 2^21310123330 is an apocalyptic number.

21310123330 is a deficient number, since it is larger than the sum of its proper divisors (17050206014).

21310123330 is a wasteful number, since it uses less digits than its factorization.

21310123330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117081.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21310123330 its reverse (3332101312), we get a palindrome (24642224642).

The spelling of 21310123330 in words is "twenty-one billion, three hundred ten million, one hundred twenty-three thousand, three hundred thirty".