12002010100021 has 2 divisors, whose sum is σ = 12002010100022. Its totient is φ = 12002010100020.

The previous prime is 12002010100013. The next prime is 12002010100027. The reversal of 12002010100021 is 12000101020021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11972215887921 + 29794212100 = 3460089^2 + 172610^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002010100021 - 2³ = 12002010100013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002010099980 and 12002010100007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12002010100027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001005050010 + 6001005050011.

It is an arithmetic number, because the mean of its divisors is an integer number (6001005050011).

Almost surely, 2^{12002010100021} is an apocalyptic number.

It is an amenable number.

12002010100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002010100021 is an equidigital number, since it uses as much as digits as its factorization.

12002010100021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12002010100021 its reverse (12000101020021), we get a palindrome (24002111120042).

The spelling of 12002010100021 in words is "twelve trillion, two billion, ten million, one hundred thousand, twenty-one".