101210406665 has 8 divisors (see below), whose sum is σ = 121455380040. Its totient is φ = 80966397312.

The previous prime is 101210406653. The next prime is 101210406673. The reversal of 101210406665 is 566604012101.

It can be written as a sum of positive squares in 4 ways, for example, as 14381765776 + 86828640889 = 119924^2 + 294667^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 101210406665 - 2¹² = 101210402569 is a prime.

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, 14621 + ... + 450149.

It is an arithmetic number, because the mean of its divisors is an integer number (15181922505).

Almost surely, 2^101210406665 is an apocalyptic number.

It is an amenable number.

101210406665 is a deficient number, since it is larger than the sum of its proper divisors (20244973375).

101210406665 is an equidigital number, since it uses as much as digits as its factorization.

101210406665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482011.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 101210406665 its reverse (566604012101), we get a palindrome (667814418766).

The spelling of 101210406665 in words is "one hundred one billion, two hundred ten million, four hundred six thousand, six hundred sixty-five".