21012222310100 has 72 divisors (see below), whose sum is σ = 52844259500928. Its totient is φ = 7102723017600.

The previous prime is 21012222310061. The next prime is 21012222310111. The reversal of 21012222310100 is 101322221012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211340867 + ... + 211440266.

It is an arithmetic number, because the mean of its divisors is an integer number (733948048624).

Almost surely, 2^{21012222310100} is an apocalyptic number.

21012222310100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012222310100 is an abundant number, since it is smaller than the sum of its proper divisors (31832037190828).

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

21012222310100 is a wasteful number, since it uses less digits than its factorization.

21012222310100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422781225 (or 422781218 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21012222310100 its reverse (101322221012), we get a palindrome (21113544531112).

The spelling of 21012222310100 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, three hundred ten thousand, one hundred".