21222231321100 has 36 divisors (see below), whose sum is σ = 48761197380504. Its totient is φ = 7989545908480.

The previous prime is 21222231321001. The next prime is 21222231321101. The reversal of 21222231321100 is 112313222212.

It is not an unprimeable number, because it can be changed into a prime (21222231321101) 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, 6241831042 + ... + 6241834441.

It is an arithmetic number, because the mean of its divisors is an integer number (1354477705014).

Almost surely, 2^{21222231321100} is an apocalyptic number.

21222231321100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222231321100 is an abundant number, since it is smaller than the sum of its proper divisors (27538966059404).

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

21222231321100 is a wasteful number, since it uses less digits than its factorization.

21222231321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12483665514 (or 12483665507 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21222231321100 its reverse (112313222212), we get a palindrome (21334544543312).

The spelling of 21222231321100 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred".