21303021213012 has 96 divisors (see below), whose sum is σ = 62171694434304. Its totient is φ = 5515460380800.

The previous prime is 21303021212951. The next prime is 21303021213017. The reversal of 21303021213012 is 21031212030312.

It is a super-2 number, since 2×21303021213012² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21303021213012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303021213017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36778903 + ... + 37353630.

It is an arithmetic number, because the mean of its divisors is an integer number (647621817024).

Almost surely, 2^{21303021213012} is an apocalyptic number.

21303021213012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21303021213012 is an abundant number, since it is smaller than the sum of its proper divisors (40868673221292).

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

21303021213012 is a wasteful number, since it uses less digits than its factorization.

21303021213012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74132869 (or 74132867 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21303021213012 its reverse (21031212030312), we get a palindrome (42334233243324).

The spelling of 21303021213012 in words is "twenty-one trillion, three hundred three billion, twenty-one million, two hundred thirteen thousand, twelve".