21012233002 has 16 divisors (see below), whose sum is σ = 33596353800. Its totient is φ = 9821744128.

The previous prime is 21012232991. The next prime is 21012233009. The reversal of 21012233002 is 20033221012.

It can be written as a sum of positive squares in 4 ways, for example, as 20825664721 + 186568281 = 144311^2 + 13659^2 .

It is not an unprimeable number, because it can be changed into a prime (21012233009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2068783 + ... + 2078914.

Almost surely, 2^21012233002 is an apocalyptic number.

21012233002 is a deficient number, since it is larger than the sum of its proper divisors (12584120798).

21012233002 is a wasteful number, since it uses less digits than its factorization.

21012233002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4147865.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21012233002 its reverse (20033221012), we get a palindrome (41045454014).

The spelling of 21012233002 in words is "twenty-one billion, twelve million, two hundred thirty-three thousand, two".