21213110112 has 48 divisors (see below), whose sum is σ = 55699180992. Its totient is φ = 7069161600.

The previous prime is 21213110053. The next prime is 21213110141. The reversal of 21213110112 is 21101131212.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 21213110091 and 21213110100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361623 + ... + 416169.

It is an arithmetic number, because the mean of its divisors is an integer number (1160399604).

Almost surely, 2^21213110112 is an apocalyptic number.

It is an amenable number.

21213110112 is an abundant number, since it is smaller than the sum of its proper divisors (34486070880).

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

21213110112 is a wasteful number, since it uses less digits than its factorization.

21213110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58611 (or 58603 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21213110112 its reverse (21101131212), we get a palindrome (42314241324).

The spelling of 21213110112 in words is "twenty-one billion, two hundred thirteen million, one hundred ten thousand, one hundred twelve".