21100312213000 has 64 divisors (see below), whose sum is σ = 49505007801600. Its totient is φ = 8417855275200.

The previous prime is 21100312212953. The next prime is 21100312213009. The reversal of 21100312213000 is 31221300112.

It is not an unprimeable number, because it can be changed into a prime (21100312213009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27457824 + ... + 28215823.

It is an arithmetic number, because the mean of its divisors is an integer number (773515746900).

Almost surely, 2^{21100312213000} is an apocalyptic number.

21100312213000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100312213000 is an abundant number, since it is smaller than the sum of its proper divisors (28404695588600).

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

21100312213000 is a wasteful number, since it uses less digits than its factorization.

21100312213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55674047 (or 55674033 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21100312213000 its reverse (31221300112), we get a palindrome (21131533513112).

The spelling of 21100312213000 in words is "twenty-one trillion, one hundred billion, three hundred twelve million, two hundred thirteen thousand".