21012302230206 has 24 divisors (see below), whose sum is σ = 48885764373000. Its totient is φ = 6003514922832.

The previous prime is 21012302230193. The next prime is 21012302230211. The reversal of 21012302230206 is 60203220321012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35735207581 + ... + 35735208168.

It is an arithmetic number, because the mean of its divisors is an integer number (2036906848875).

Almost surely, 2^{21012302230206} is an apocalyptic number.

21012302230206 is an abundant number, since it is smaller than the sum of its proper divisors (27873462142794).

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

21012302230206 is a wasteful number, since it uses less digits than its factorization.

21012302230206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71470415768 (or 71470415761 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21012302230206 its reverse (60203220321012), we get a palindrome (81215522551218).

The spelling of 21012302230206 in words is "twenty-one trillion, twelve billion, three hundred two million, two hundred thirty thousand, two hundred six".