1201310101 has 4 divisors (see below), whose sum is σ = 1201401900. Its totient is φ = 1201218304.

The previous prime is 1201310081. The next prime is 1201310111. The reversal of 1201310101 is 1010131021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 55487601 + 1145822500 = 7449^2 + 33850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201310101 - 2⁵ = 1201310069 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 (1201310111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22186 + ... + 53803.

It is an arithmetic number, because the mean of its divisors is an integer number (300350475).

Almost surely, 2^1201310101 is an apocalyptic number.

It is an amenable number.

1201310101 is a deficient number, since it is larger than the sum of its proper divisors (91799).

1201310101 is an equidigital number, since it uses as much as digits as its factorization.

1201310101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91798.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1201310101 is about 34659.9206721539. The cubic root of 1201310101 is about 1063.0451479936.

Adding to 1201310101 its reverse (1010131021), we get a palindrome (2211441122).

The spelling of 1201310101 in words is "one billion, two hundred one million, three hundred ten thousand, one hundred one".