21002210010 has 64 divisors (see below), whose sum is σ = 56028672000. Its totient is φ = 5598311616.

The previous prime is 21002210003. The next prime is 21002210017. The reversal of 21002210010 is 1001220012.

It is an interprime number because it is at equal distance from previous prime (21002210003) and next prime (21002210017).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21002209974 and 21002210001.

It is not an unprimeable number, because it can be changed into a prime (21002210017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 711016 + ... + 739964.

It is an arithmetic number, because the mean of its divisors is an integer number (875448000).

Almost surely, 2^21002210010 is an apocalyptic number.

21002210010 is an abundant number, since it is smaller than the sum of its proper divisors (35026461990).

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

21002210010 is a wasteful number, since it uses less digits than its factorization.

21002210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31652 (or 31646 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21002210010 its reverse (1001220012), we get a palindrome (22003430022).

The spelling of 21002210010 in words is "twenty-one billion, two million, two hundred ten thousand, ten".