1201011101 has 4 divisors (see below), whose sum is σ = 1201197600. Its totient is φ = 1200824604.

The previous prime is 1201011067. The next prime is 1201011107. The reversal of 1201011101 is 1011101021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201011101 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 (1201011107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83231 + ... + 96588.

It is an arithmetic number, because the mean of its divisors is an integer number (300299400).

Almost surely, 2^1201011101 is an apocalyptic number.

It is an amenable number.

1201011101 is a deficient number, since it is larger than the sum of its proper divisors (186499).

1201011101 is an equidigital number, since it uses as much as digits as its factorization.

1201011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186498.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1201011101 is about 34655.6070643698. The cubic root of 1201011101 is about 1062.9569451577.

Adding to 1201011101 its reverse (1011101021), we get a palindrome (2212112122).

The spelling of 1201011101 in words is "one billion, two hundred one million, eleven thousand, one hundred one".