21321033211220 has 24 divisors (see below), whose sum is σ = 44961509376000. Its totient is φ = 8492729544992.

The previous prime is 21321033211211. The next prime is 21321033211223. The reversal of 21321033211220 is 2211233012312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321033211223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230228820 + ... + 2230238379.

It is an arithmetic number, because the mean of its divisors is an integer number (1873396224000).

Almost surely, 2^{21321033211220} is an apocalyptic number.

21321033211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321033211220 is an abundant number, since it is smaller than the sum of its proper divisors (23640476164780).

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

21321033211220 is a wasteful number, since it uses less digits than its factorization.

21321033211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460467447 (or 4460467445 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21321033211220 its reverse (2211233012312), we get a palindrome (23532266223532).

The spelling of 21321033211220 in words is "twenty-one trillion, three hundred twenty-one billion, thirty-three million, two hundred eleven thousand, two hundred twenty".