21003121314 has 64 divisors (see below), whose sum is σ = 53999873280. Its totient is φ = 6000883056.

The previous prime is 21003121289. The next prime is 21003121357. The reversal of 21003121314 is 41312130012.

It is a super-2 number, since 2×21003121314² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312369 + ... + 373604.

It is an arithmetic number, because the mean of its divisors is an integer number (843748020).

Almost surely, 2^21003121314 is an apocalyptic number.

21003121314 is an abundant number, since it is smaller than the sum of its proper divisors (32996751966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21003121314 is an frugal number, since it uses more digits than its factorization.

21003121314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686003 (or 685985 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21003121314 its reverse (41312130012), we get a palindrome (62315251326).

The spelling of 21003121314 in words is "twenty-one billion, three million, one hundred twenty-one thousand, three hundred fourteen".