21220111223300 has 36 divisors (see below), whose sum is σ = 50233790571216. Its totient is φ = 7716404080800.

The previous prime is 21220111223291. The next prime is 21220111223357. The reversal of 21220111223300 is 332211102212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9645504002 + ... + 9645506201.

Almost surely, 2^{21220111223300} is an apocalyptic number.

21220111223300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220111223300 is an abundant number, since it is smaller than the sum of its proper divisors (29013679347916).

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

21220111223300 is a wasteful number, since it uses less digits than its factorization.

21220111223300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19291010228 (or 19291010221 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21220111223300 its reverse (332211102212), we get a palindrome (21552322325512).

The spelling of 21220111223300 in words is "twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-three thousand, three hundred".