10210121999965 has 8 divisors (see below), whose sum is σ = 12278723726808. Its totient is φ = 8150379382080.

The previous prime is 10210121999953. The next prime is 10210121999989. The reversal of 10210121999965 is 56999912101201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2433369125476 + 7776752874489 = 1559926^2 + 2788683^2 .

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

It is not a de Polignac number, because 10210121999965 - 2⁵ = 10210121999933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2214774702 + ... + 2214779311.

It is an arithmetic number, because the mean of its divisors is an integer number (1534840465851).

Almost surely, 2^{10210121999965} is an apocalyptic number.

It is an amenable number.

10210121999965 is a deficient number, since it is larger than the sum of its proper divisors (2068601726843).

10210121999965 is an equidigital number, since it uses as much as digits as its factorization.

10210121999965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429554479.

The product of its (nonzero) digits is 787320, while the sum is 55.

The spelling of 10210121999965 in words is "ten trillion, two hundred ten billion, one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred sixty-five".