1213201100101 has 16 divisors (see below), whose sum is σ = 1282519384960. Its totient is φ = 1144430622720.

The previous prime is 1213201100093. The next prime is 1213201100113. The reversal of 1213201100101 is 1010011023121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1213201100101 - 2³ = 1213201100093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213201100801) 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, 53182840 + ... + 53205646.

It is an arithmetic number, because the mean of its divisors is an integer number (80157461560).

Almost surely, 2^{1213201100101} is an apocalyptic number.

It is an amenable number.

1213201100101 is a deficient number, since it is larger than the sum of its proper divisors (69318284859).

1213201100101 is a wasteful number, since it uses less digits than its factorization.

1213201100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34684.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1213201100101 its reverse (1010011023121), we get a palindrome (2223212123222).

The spelling of 1213201100101 in words is "one trillion, two hundred thirteen billion, two hundred one million, one hundred thousand, one hundred one".