21202102112 has 12 divisors (see below), whose sum is σ = 41741638596. Its totient is φ = 10601051040.

The previous prime is 21202102111. The next prime is 21202102153. The reversal of 21202102112 is 21120120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202102111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331282814 + ... + 331282877.

It is an arithmetic number, because the mean of its divisors is an integer number (3478469883).

Almost surely, 2^21202102112 is an apocalyptic number.

It is an amenable number.

21202102112 is a deficient number, since it is larger than the sum of its proper divisors (20539536484).

21202102112 is an equidigital number, since it uses as much as digits as its factorization.

21202102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662565701 (or 662565693 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202102112 its reverse (21120120212), we get a palindrome (42322222324).

The spelling of 21202102112 in words is "twenty-one billion, two hundred two million, one hundred two thousand, one hundred twelve".