21000203122310 has 16 divisors (see below), whose sum is σ = 37800471246336. Its totient is φ = 8400057776448.

The previous prime is 21000203122247. The next prime is 21000203122333. The reversal of 21000203122310 is 1322130200012.

It is a super-2 number, since 2×21000203122310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 1085834 + ... + 6571106.

It is an arithmetic number, because the mean of its divisors is an integer number (2362529452896).

Almost surely, 2^{21000203122310} is an apocalyptic number.

21000203122310 is a deficient number, since it is larger than the sum of its proper divisors (16800268124026).

21000203122310 is a wasteful number, since it uses less digits than its factorization.

21000203122310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5868127.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21000203122310 its reverse (1322130200012), we get a palindrome (22322333322322).

The spelling of 21000203122310 in words is "twenty-one trillion, two hundred three million, one hundred twenty-two thousand, three hundred ten".