10012012210021 has 4 divisors (see below), whose sum is σ = 10018772516844. Its totient is φ = 10005251903200.

The previous prime is 10012012209973. The next prime is 10012012210027. The reversal of 10012012210021 is 12001221021001.

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 6220759281025 + 3791252928996 = 2494145^2 + 1947114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10012012210021 is a prime.

It is a super-2 number, since 2×10012012210021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10012012209983 and 10012012210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012012210027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3380151190 + ... + 3380154151.

It is an arithmetic number, because the mean of its divisors is an integer number (2504693129211).

Almost surely, 2^{10012012210021} is an apocalyptic number.

It is an amenable number.

10012012210021 is a deficient number, since it is larger than the sum of its proper divisors (6760306823).

10012012210021 is an equidigital number, since it uses as much as digits as its factorization.

10012012210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760306822.

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

Adding to 10012012210021 its reverse (12001221021001), we get a palindrome (22013233231022).

The spelling of 10012012210021 in words is "ten trillion, twelve billion, twelve million, two hundred ten thousand, twenty-one".