2100212120003 has 2 divisors, whose sum is σ = 2100212120004. Its totient is φ = 2100212120002.

The previous prime is 2100212119997. The next prime is 2100212120101. The reversal of 2100212120003 is 3000212120012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100212120003 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100212120003.

It is not a weakly prime, because it can be changed into another prime (2100217120003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050106060001 + 1050106060002.

It is an arithmetic number, because the mean of its divisors is an integer number (1050106060002).

Almost surely, 2^{2100212120003} is an apocalyptic number.

2100212120003 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100212120003 is an equidigital number, since it uses as much as digits as its factorization.

2100212120003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 2100212120003 its reverse (3000212120012), we get a palindrome (5100424240015).

Subtracting 2100212120003 from its reverse (3000212120012), we obtain a palindrome (900000000009).

The spelling of 2100212120003 in words is "two trillion, one hundred billion, two hundred twelve million, one hundred twenty thousand, three".