21020132002 has 16 divisors (see below), whose sum is σ = 32625588600. Its totient is φ = 10145116800.

The previous prime is 21020131999. The next prime is 21020132017. The reversal of 21020132002 is 20023102012.

It can be written as a sum of positive squares in 4 ways, for example, as 9271956681 + 11748175321 = 96291^2 + 108389^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200524 + ... + 286792.

Almost surely, 2^21020132002 is an apocalyptic number.

21020132002 is a deficient number, since it is larger than the sum of its proper divisors (11605456598).

21020132002 is a wasteful number, since it uses less digits than its factorization.

21020132002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90501.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21020132002 its reverse (20023102012), we get a palindrome (41043234014).

The spelling of 21020132002 in words is "twenty-one billion, twenty million, one hundred thirty-two thousand, two".