21123103302 has 48 divisors (see below), whose sum is σ = 53162302752. Its totient is φ = 5936232960.

The previous prime is 21123103297. The next prime is 21123103327. The reversal of 21123103302 is 20330132112.

21123103302 is a `hidden beast` number, since 21 + 1 + 2 + 310 + 330 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 1366443 + ... + 1381814.

It is an arithmetic number, because the mean of its divisors is an integer number (1107547974).

Almost surely, 2^21123103302 is an apocalyptic number.

21123103302 is an abundant number, since it is smaller than the sum of its proper divisors (32039199450).

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

21123103302 is a wasteful number, since it uses less digits than its factorization.

21123103302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748333 (or 2748330 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21123103302 its reverse (20330132112), we get a palindrome (41453235414).

The spelling of 21123103302 in words is "twenty-one billion, one hundred twenty-three million, one hundred three thousand, three hundred two".