21103121302 has 8 divisors (see below), whose sum is σ = 32746222800. Its totient is φ = 10187713704.

The previous prime is 21103121293. The next prime is 21103121311. The reversal of 21103121302 is 20312130112.

It is an interprime number because it is at equal distance from previous prime (21103121293) and next prime (21103121311).

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

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 3 ways as a sum of consecutive naturals, for example, 181923402 + ... + 181923517.

It is an arithmetic number, because the mean of its divisors is an integer number (4093277850).

Almost surely, 2^21103121302 is an apocalyptic number.

21103121302 is a deficient number, since it is larger than the sum of its proper divisors (11643101498).

21103121302 is a wasteful number, since it uses less digits than its factorization.

21103121302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363846950.

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

Adding to 21103121302 its reverse (20312130112), we get a palindrome (41415251414).

The spelling of 21103121302 in words is "twenty-one billion, one hundred three million, one hundred twenty-one thousand, three hundred two".