21210003012102 has 32 divisors (see below), whose sum is σ = 44924333402592. Its totient is φ = 6652780383744.

The previous prime is 21210003012047. The next prime is 21210003012127. The reversal of 21210003012102 is 20121030001212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20399773 + ... + 21414264.

It is an arithmetic number, because the mean of its divisors is an integer number (1403885418831).

Almost surely, 2^{21210003012102} is an apocalyptic number.

21210003012102 is an abundant number, since it is smaller than the sum of its proper divisors (23714330390490).

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

21210003012102 is a wasteful number, since it uses less digits than its factorization.

21210003012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41819032.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21210003012102 its reverse (20121030001212), we get a palindrome (41331033013314).

The spelling of 21210003012102 in words is "twenty-one trillion, two hundred ten billion, three million, twelve thousand, one hundred two".