21400313012220 has 48 divisors (see below), whose sum is σ = 59924539815840. Its totient is φ = 5706401243136.

The previous prime is 21400313012189. The next prime is 21400313012303. The reversal of 21400313012220 is 2221031300412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9912597 + ... + 11876876.

It is an arithmetic number, because the mean of its divisors is an integer number (1248427912830).

Almost surely, 2^{21400313012220} is an apocalyptic number.

21400313012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21400313012220 is an abundant number, since it is smaller than the sum of its proper divisors (38524226803620).

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

21400313012220 is a wasteful number, since it uses less digits than its factorization.

21400313012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21805854 (or 21805852 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21400313012220 its reverse (2221031300412), we get a palindrome (23621344312632).

The spelling of 21400313012220 in words is "twenty-one trillion, four hundred billion, three hundred thirteen million, twelve thousand, two hundred twenty".