21330223031100 has 72 divisors (see below), whose sum is σ = 61722436729968. Its totient is φ = 5687415104000.

The previous prime is 21330223031087. The next prime is 21330223031101. The reversal of 21330223031100 is 113032203312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330223031101) 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, 1371801 + ... + 6674000.

It is an arithmetic number, because the mean of its divisors is an integer number (857256065694).

Almost surely, 2^{21330223031100} is an apocalyptic number.

21330223031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21330223031100 is an abundant number, since it is smaller than the sum of its proper divisors (40392213698868).

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

21330223031100 is a wasteful number, since it uses less digits than its factorization.

21330223031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054655 (or 8054648 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21330223031100 its reverse (113032203312), we get a palindrome (21443255234412).

The spelling of 21330223031100 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-three million, thirty-one thousand, one hundred".