21231002 has 16 divisors (see below), whose sum is σ = 34413792. Its totient is φ = 9765360.

The previous prime is 21230969. The next prime is 21231029. The reversal of 21231002 is 20013212.

It is a happy number.

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, 7373 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (2150862).

Almost surely, 2^21231002 is an apocalyptic number.

21231002 is a deficient number, since it is larger than the sum of its proper divisors (13182790).

21231002 is a wasteful number, since it uses less digits than its factorization.

21231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21231002 is about 4607.7111454604. The cubic root of 21231002 is about 276.9003451466.

Adding to 21231002 its reverse (20013212), we get a palindrome (41244214).

It can be divided in two parts, 2123 and 1002, that added together give a 5-th power (3125 = 5⁵).

The spelling of 21231002 in words is "twenty-one million, two hundred thirty-one thousand, two".