21221423031300 has 36 divisors (see below), whose sum is σ = 61400650638096. Its totient is φ = 5659046141600.

The previous prime is 21221423031299. The next prime is 21221423031311. The reversal of 21221423031300 is 313032412212.

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, 35369038086 + ... + 35369038685.

It is an arithmetic number, because the mean of its divisors is an integer number (1705573628836).

Almost surely, 2^{21221423031300} is an apocalyptic number.

21221423031300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221423031300 is an abundant number, since it is smaller than the sum of its proper divisors (40179227606796).

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

21221423031300 is a wasteful number, since it uses less digits than its factorization.

21221423031300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70738076788 (or 70738076781 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21221423031300 its reverse (313032412212), we get a palindrome (21534455443512).

The spelling of 21221423031300 in words is "twenty-one trillion, two hundred twenty-one billion, four hundred twenty-three million, thirty-one thousand, three hundred".