10002102011221 has 4 divisors (see below), whose sum is σ = 10012776614092. Its totient is φ = 9991427408352.

The previous prime is 10002102011207. The next prime is 10002102011273. The reversal of 10002102011221 is 12211020120001.

10002102011221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3329639572900 + 6672462438321 = 1824730^2 + 2583111^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002102011221 - 2⁹ = 10002102010709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002102011021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5337300030 + ... + 5337301903.

It is an arithmetic number, because the mean of its divisors is an integer number (2503194153523).

Almost surely, 2^{10002102011221} is an apocalyptic number.

It is an amenable number.

10002102011221 is a deficient number, since it is larger than the sum of its proper divisors (10674602871).

10002102011221 is an equidigital number, since it uses as much as digits as its factorization.

10002102011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10674602870.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10002102011221 its reverse (12211020120001), we get a palindrome (22213122131222).

The spelling of 10002102011221 in words is "ten trillion, two billion, one hundred two million, eleven thousand, two hundred twenty-one".