21202003412 has 12 divisors (see below), whose sum is σ = 37149375060. Its totient is φ = 10587896256.

The previous prime is 21202003397. The next prime is 21202003439. The reversal of 21202003412 is 21430020212.

It can be written as a sum of positive squares in 2 ways, for example, as 18064435216 + 3137568196 = 134404^2 + 56014^2 .

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, 3272723 + ... + 3279194.

It is an arithmetic number, because the mean of its divisors is an integer number (3095781255).

Almost surely, 2^21202003412 is an apocalyptic number.

It is an amenable number.

21202003412 is a deficient number, since it is larger than the sum of its proper divisors (15947371648).

21202003412 is a wasteful number, since it uses less digits than its factorization.

21202003412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552730 (or 6552728 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21202003412 its reverse (21430020212), we get a palindrome (42632023624).

The spelling of 21202003412 in words is "twenty-one billion, two hundred two million, three thousand, four hundred twelve".