10012012021001 has 4 divisors (see below), whose sum is σ = 10012019544900. Its totient is φ = 10012004497104.

The previous prime is 10012012020977. The next prime is 10012012021009. The reversal of 10012012021001 is 10012021021001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3317683745401 + 6694328275600 = 1821451^2 + 2587340^2 .

It is a cyclic number.

It is not a de Polignac number, because 10012012021001 - 2¹⁸ = 10012011758857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10012012021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171166 + ... + 4625543.

It is an arithmetic number, because the mean of its divisors is an integer number (2503004886225).

Almost surely, 2^{10012012021001} is an apocalyptic number.

It is an amenable number.

10012012021001 is a deficient number, since it is larger than the sum of its proper divisors (7523899).

10012012021001 is an equidigital number, since it uses as much as digits as its factorization.

10012012021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523898.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10012012021001 its reverse (10012021021001), we get a palindrome (20024033042002).

Subtracting 10012012021001 from its reverse (10012021021001), we obtain a square (9000000 = 3000²).

The spelling of 10012012021001 in words is "ten trillion, twelve billion, twelve million, twenty-one thousand, one".