21003313321012 has 48 divisors (see below), whose sum is σ = 40254636989952. Its totient is φ = 9509492746080.

The previous prime is 21003313320961. The next prime is 21003313321027. The reversal of 21003313321012 is 21012331330012.

It is a super-2 number, since 2×21003313321012² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97872943 + ... + 98087305.

It is an arithmetic number, because the mean of its divisors is an integer number (838638270624).

Almost surely, 2^{21003313321012} is an apocalyptic number.

21003313321012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21003313321012 is a deficient number, since it is larger than the sum of its proper divisors (19251323668940).

21003313321012 is a wasteful number, since it uses less digits than its factorization.

21003313321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223108 (or 223106 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21003313321012 its reverse (21012331330012), we get a palindrome (42015644651024).

The spelling of 21003313321012 in words is "twenty-one trillion, three billion, three hundred thirteen million, three hundred twenty-one thousand, twelve".