10000021021002 has 20 divisors (see below), whose sum is σ = 22407454510386. Its totient is φ = 3333340340280.

The previous prime is 10000021020959. The next prime is 10000021021007. The reversal of 10000021021002 is 20012012000001.

It can be written as a sum of positive squares in only one way, i.e., 9986731312041 + 13289708961 = 3160179^2 + 115281^2 .

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

It is not an unprimeable number, because it can be changed into a prime (10000021021007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 30864262249 + ... + 30864262572.

Almost surely, 2^{10000021021002} is an apocalyptic number.

10000021021002 is an abundant number, since it is smaller than the sum of its proper divisors (12407433489384).

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

10000021021002 is an equidigital number, since it uses as much as digits as its factorization.

10000021021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61728524835 (or 61728524826 counting only the distinct ones).

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

Adding to 10000021021002 its reverse (20012012000001), we get a palindrome (30012033021003).

The spelling of 10000021021002 in words is "ten trillion, twenty-one million, twenty-one thousand, two".