10212111999965 has 8 divisors (see below), whose sum is σ = 12422404734648. Its totient is φ = 8057776043520.

The previous prime is 10212111999959. The next prime is 10212111999977. The reversal of 10212111999965 is 56999911121201.

It can be written as a sum of positive squares in 4 ways, for example, as 674403930841 + 9537708069124 = 821221^2 + 3088318^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10212111999965 - 2⁸ = 10212111999709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10212111999965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13989194156 + ... + 13989194885.

It is an arithmetic number, because the mean of its divisors is an integer number (1552800591831).

Almost surely, 2^{10212111999965} is an apocalyptic number.

It is an amenable number.

10212111999965 is a deficient number, since it is larger than the sum of its proper divisors (2210292734683).

10212111999965 is an equidigital number, since it uses as much as digits as its factorization.

10212111999965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27978389119.

The product of its (nonzero) digits is 787320, while the sum is 56.

The spelling of 10212111999965 in words is "ten trillion, two hundred twelve billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred sixty-five".