21211103323320 has 32 divisors (see below), whose sum is σ = 63633309970320. Its totient is φ = 5656294219520.

The previous prime is 21211103323309. The next prime is 21211103323379. The reversal of 21211103323320 is 2332330111212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88379597061 + ... + 88379597300.

Almost surely, 2^{21211103323320} is an apocalyptic number.

21211103323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211103323320 is an abundant number, since it is smaller than the sum of its proper divisors (42422206647000).

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

21211103323320 is a wasteful number, since it uses less digits than its factorization.

21211103323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176759194375 (or 176759194371 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21211103323320 its reverse (2332330111212), we get a palindrome (23543433434532).

The spelling of 21211103323320 in words is "twenty-one trillion, two hundred eleven billion, one hundred three million, three hundred twenty-three thousand, three hundred twenty".