21003203320312 has 64 divisors (see below), whose sum is σ = 41095325168640. Its totient is φ = 10052145868800.

The previous prime is 21003203320303. The next prime is 21003203320349. The reversal of 21003203320312 is 21302330230012.

It is a super-2 number, since 2×21003203320312² (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 15 ways as a sum of consecutive naturals, for example, 16392183 + ... + 17626969.

It is an arithmetic number, because the mean of its divisors is an integer number (642114455760).

Almost surely, 2^{21003203320312} is an apocalyptic number.

It is an amenable number.

21003203320312 is a deficient number, since it is larger than the sum of its proper divisors (20092121848328).

21003203320312 is a wasteful number, since it uses less digits than its factorization.

21003203320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235572 (or 1235568 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21003203320312 its reverse (21302330230012), we get a palindrome (42305533550324).

The spelling of 21003203320312 in words is "twenty-one trillion, three billion, two hundred three million, three hundred twenty thousand, three hundred twelve".