1218541101 has 16 divisors (see below), whose sum is σ = 1654862400. Its totient is φ = 797333888.

The previous prime is 1218541069. The next prime is 1218541123. The reversal of 1218541101 is 1011458121.

It is a cyclic number.

It is not a de Polignac number, because 1218541101 - 2⁵ = 1218541069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218541301) 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, 114745 + ... + 124913.

It is an arithmetic number, because the mean of its divisors is an integer number (103428900).

Almost surely, 2^1218541101 is an apocalyptic number.

It is an amenable number.

1218541101 is a deficient number, since it is larger than the sum of its proper divisors (436321299).

1218541101 is a wasteful number, since it uses less digits than its factorization.

1218541101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10908.

The product of its (nonzero) digits is 320, while the sum is 24.

The square root of 1218541101 is about 34907.6080675832. The cubic root of 1218541101 is about 1068.1036375953.

Adding to 1218541101 its reverse (1011458121), we get a palindrome (2229999222).

The spelling of 1218541101 in words is "one billion, two hundred eighteen million, five hundred forty-one thousand, one hundred one".