21432221343100 has 36 divisors (see below), whose sum is σ = 46637468917200. Its totient is φ = 8549008610560.

The previous prime is 21432221343077. The next prime is 21432221343109. The reversal of 21432221343100 is 134312223412.

It is a super-2 number, since 2×21432221343100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432221343109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298463005 + ... + 298534804.

It is an arithmetic number, because the mean of its divisors is an integer number (1295485247700).

Almost surely, 2^{21432221343100} is an apocalyptic number.

21432221343100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21432221343100 is an abundant number, since it is smaller than the sum of its proper divisors (25205247574100).

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

21432221343100 is a wasteful number, since it uses less digits than its factorization.

21432221343100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596998182 (or 596998175 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21432221343100 its reverse (134312223412), we get a palindrome (21566533566512).

The spelling of 21432221343100 in words is "twenty-one trillion, four hundred thirty-two billion, two hundred twenty-one million, three hundred forty-three thousand, one hundred".