21002230002 has 32 divisors (see below), whose sum is σ = 45311954688. Its totient is φ = 6451312896.

The previous prime is 21002229967. The next prime is 21002230019. The reversal of 21002230002 is 20003220012.

It is a self number, because there is not a number n which added to its sum of digits gives 21002230002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180778 + ... + 273285.

It is an arithmetic number, because the mean of its divisors is an integer number (1415998584).

Almost surely, 2^21002230002 is an apocalyptic number.

21002230002 is an abundant number, since it is smaller than the sum of its proper divisors (24309724686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002230002 is a wasteful number, since it uses less digits than its factorization.

21002230002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454674.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21002230002 its reverse (20003220012), we get a palindrome (41005450014).

The spelling of 21002230002 in words is "twenty-one billion, two million, two hundred thirty thousand, two".