21010202012 has 144 divisors (see below), whose sum is σ = 42703137792. Its totient is φ = 9002104320.

The previous prime is 21010201999. The next prime is 21010202039. The reversal of 21010202012 is 21020201012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21010201984 and 21010202002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92555843 + ... + 92556069.

It is an arithmetic number, because the mean of its divisors is an integer number (296549568).

Almost surely, 2^21010202012 is an apocalyptic number.

It is an amenable number.

21010202012 is an abundant number, since it is smaller than the sum of its proper divisors (21692935780).

21010202012 is a wasteful number, since it uses less digits than its factorization.

21010202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21010202012 its reverse (21020201012), we get a palindrome (42030403024).

The spelling of 21010202012 in words is "twenty-one billion, ten million, two hundred two thousand, twelve".