101206665405 has 56 divisors (see below), whose sum is σ = 182171271840. Its totient is φ = 53952415200.

The previous prime is 101206665359. The next prime is 101206665467. The reversal of 101206665405 is 504566602101.

It is not a de Polignac number, because 101206665405 - 2¹⁰ = 101206664381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101206665405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 10387026 + ... + 10396764.

Almost surely, 2^101206665405 is an apocalyptic number.

101206665405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101206665405 is a deficient number, since it is larger than the sum of its proper divisors (80964606435).

101206665405 is an frugal number, since it uses more digits than its factorization.

101206665405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12613 (or 12598 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 101206665405 in words is "one hundred one billion, two hundred six million, six hundred sixty-five thousand, four hundred five".