21102112402 has 8 divisors (see below), whose sum is σ = 36175049856. Its totient is φ = 9043762452.

The previous prime is 21102112391. The next prime is 21102112433. The reversal of 21102112402 is 20421120112.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 753646858 + ... + 753646885.

It is an arithmetic number, because the mean of its divisors is an integer number (4521881232).

Almost surely, 2^21102112402 is an apocalyptic number.

21102112402 is a deficient number, since it is larger than the sum of its proper divisors (15072937454).

21102112402 is a wasteful number, since it uses less digits than its factorization.

21102112402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507293752.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21102112402 its reverse (20421120112), we get a palindrome (41523232514).

The spelling of 21102112402 in words is "twenty-one billion, one hundred two million, one hundred twelve thousand, four hundred two".