21002000102 has 8 divisors (see below), whose sum is σ = 32173276896. Its totient is φ = 10277574472.

The previous prime is 21002000099. The next prime is 21002000147. The reversal of 21002000102 is 20100020012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21002000102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111712673 + ... + 111712860.

It is an arithmetic number, because the mean of its divisors is an integer number (4021659612).

Almost surely, 2^21002000102 is an apocalyptic number.

21002000102 is a deficient number, since it is larger than the sum of its proper divisors (11171276794).

21002000102 is a wasteful number, since it uses less digits than its factorization.

21002000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223425582.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21002000102 its reverse (20100020012), we get a palindrome (41102020114).

The spelling of 21002000102 in words is "twenty-one billion, two million, one hundred two", and thus it is an aban number.