21002123112310 has 16 divisors (see below), whose sum is σ = 37822093182000. Its totient is φ = 8396788893856.

The previous prime is 21002123112307. The next prime is 21002123112391. The reversal of 21002123112310 is 1321132120012.

It is a super-2 number, since 2×21002123112310² (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, 507522160 + ... + 507563539.

It is an arithmetic number, because the mean of its divisors is an integer number (2363880823875).

Almost surely, 2^{21002123112310} is an apocalyptic number.

21002123112310 is a deficient number, since it is larger than the sum of its proper divisors (16819970069690).

21002123112310 is a wasteful number, since it uses less digits than its factorization.

21002123112310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015087775.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21002123112310 its reverse (1321132120012), we get a palindrome (22323255232322).

The spelling of 21002123112310 in words is "twenty-one trillion, two billion, one hundred twenty-three million, one hundred twelve thousand, three hundred ten".