10002120002 has 24 divisors (see below), whose sum is σ = 17475505740. Its totient is φ = 4281016320.

The previous prime is 10002119947. The next prime is 10002120031. The reversal of 10002120002 is 20002120001.

It can be written as a sum of positive squares in 2 ways, for example, as 9147200881 + 854919121 = 95641^2 + 29239^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9002 + ... + 141722.

Almost surely, 2^10002120002 is an apocalyptic number.

10002120002 is a deficient number, since it is larger than the sum of its proper divisors (7473385738).

10002120002 is a wasteful number, since it uses less digits than its factorization.

10002120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133506 (or 133499 counting only the distinct ones).

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

Adding to 10002120002 its reverse (20002120001), we get a palindrome (30004240003).

Subtracting 10002120002 from its reverse (20002120001), we obtain a palindrome (9999999999).

The spelling of 10002120002 in words is "ten billion, two million, one hundred twenty thousand, two".