1217100101 has 16 divisors (see below), whose sum is σ = 1443287040. Its totient is φ = 1004209920.

The previous prime is 1217100067. The next prime is 1217100107. The reversal of 1217100101 is 1010017121.

It is not a de Polignac number, because 1217100101 - 2¹⁰ = 1217099077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217100107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59516 + ... + 77306.

It is an arithmetic number, because the mean of its divisors is an integer number (90205440).

Almost surely, 2^1217100101 is an apocalyptic number.

It is an amenable number.

1217100101 is a deficient number, since it is larger than the sum of its proper divisors (226186939).

1217100101 is a wasteful number, since it uses less digits than its factorization.

1217100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18164.

The product of its (nonzero) digits is 14, while the sum is 14.

The square root of 1217100101 is about 34886.9617622401. The cubic root of 1217100101 is about 1067.6824387131.

Adding to 1217100101 its reverse (1010017121), we get a palindrome (2227117222).

The spelling of 1217100101 in words is "one billion, two hundred seventeen million, one hundred thousand, one hundred one".