1201000111101 has 36 divisors (see below), whose sum is σ = 2025137966592. Its totient is φ = 683860668624.

The previous prime is 1201000111093. The next prime is 1201000111147. The reversal of 1201000111101 is 1011110001021.

It is not a de Polignac number, because 1201000111101 - 2³ = 1201000111093 is a prime.

It is a super-2 number, since 2×1201000111101² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201000111601) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4686781 + ... + 4936386.

Almost surely, 2^{1201000111101} is an apocalyptic number.

It is an amenable number.

1201000111101 is a deficient number, since it is larger than the sum of its proper divisors (824137855491).

1201000111101 is a wasteful number, since it uses less digits than its factorization.

1201000111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9623470 (or 9623460 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1201000111101 its reverse (1011110001021), we get a palindrome (2212110112122).

The spelling of 1201000111101 in words is "one trillion, two hundred one billion, one hundred eleven thousand, one hundred one".