1217449101 has 16 divisors (see below), whose sum is σ = 1875002688. Its totient is φ = 694444800.

The previous prime is 1217449007. The next prime is 1217449109. The reversal of 1217449101 is 1019447121.

It is not a de Polignac number, because 1217449101 - 2¹⁰ = 1217448077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217449109) 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, 1084510 + ... + 1085631.

It is an arithmetic number, because the mean of its divisors is an integer number (117187668).

Almost surely, 2^1217449101 is an apocalyptic number.

1217449101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1217449101 is a deficient number, since it is larger than the sum of its proper divisors (657553587).

1217449101 is a wasteful number, since it uses less digits than its factorization.

1217449101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170172.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1217449101 is about 34891.9632723640. The cubic root of 1217449101 is about 1067.7844805968.

The spelling of 1217449101 in words is "one billion, two hundred seventeen million, four hundred forty-nine thousand, one hundred one".