21031003102 has 4 divisors (see below), whose sum is σ = 31546504656. Its totient is φ = 10515501550.

The previous prime is 21031003099. The next prime is 21031003121. The reversal of 21031003102 is 20130013012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5257750774 + ... + 5257750777.

It is an arithmetic number, because the mean of its divisors is an integer number (7886626164).

Almost surely, 2^21031003102 is an apocalyptic number.

21031003102 is a deficient number, since it is larger than the sum of its proper divisors (10515501554).

21031003102 is a wasteful number, since it uses less digits than its factorization.

21031003102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10515501553.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21031003102 its reverse (20130013012), we get a palindrome (41161016114).

The spelling of 21031003102 in words is "twenty-one billion, thirty-one million, three thousand, one hundred two".