21321162300000 has 144 divisors (see below), whose sum is σ = 69955587337104. Its totient is φ = 5685643200000.

The previous prime is 21321162299993. The next prime is 21321162300007. The reversal of 21321162300000 is 326112312.

It is an interprime number because it is at equal distance from previous prime (21321162299993) and next prime (21321162300007).

It is a self number, because there is not a number n which added to its sum of digits gives 21321162300000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321162300007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35235271 + ... + 35835270.

It is an arithmetic number, because the mean of its divisors is an integer number (485802689841).

Almost surely, 2^{21321162300000} is an apocalyptic number.

21321162300000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321162300000 is an abundant number, since it is smaller than the sum of its proper divisors (48634425037104).

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

21321162300000 is an frugal number, since it uses more digits than its factorization.

21321162300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71070579 (or 71070551 counting only the distinct ones).

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

Adding to 21321162300000 its reverse (326112312), we get a palindrome (21321488412312).

The spelling of 21321162300000 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred sixty-two million, three hundred thousand".