16635112101 has 8 divisors (see below), whose sum is σ = 24644610560. Its totient is φ = 11090074716.

The previous prime is 16635112061. The next prime is 16635112103. The reversal of 16635112101 is 10121153661.

16635112101 is a `hidden beast` number, since 1 + 6 + 635 + 1 + 1 + 21 + 0 + 1 = 666.

It is not a de Polignac number, because 16635112101 - 2⁷ = 16635111973 is a prime.

It is a super-2 number, since 2×16635112101² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 616115263 = 16635112101 / (1 + 6 + 6 + 3 + 5 + 1 + 1 + 2 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16635112103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308057605 + ... + 308057658.

It is an arithmetic number, because the mean of its divisors is an integer number (3080576320).

Almost surely, 2^16635112101 is an apocalyptic number.

It is an amenable number.

16635112101 is a deficient number, since it is larger than the sum of its proper divisors (8009498459).

16635112101 is an equidigital number, since it uses as much as digits as its factorization.

16635112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616115272 (or 616115266 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 16635112101 its reverse (10121153661), we get a palindrome (26756265762).

The spelling of 16635112101 in words is "sixteen billion, six hundred thirty-five million, one hundred twelve thousand, one hundred one".