121201311013 has 4 divisors (see below), whose sum is σ = 121205282380. Its totient is φ = 121197339648.

The previous prime is 121201310983. The next prime is 121201311047. The reversal of 121201311013 is 310113102121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310113102121 = 67 ⋅4628553763.

It can be written as a sum of positive squares in 2 ways, for example, as 38140918209 + 83060392804 = 195297^2 + 288202^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201311013 - 2⁵ = 121201310981 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 (121201311073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1939548 + ... + 2001061.

It is an arithmetic number, because the mean of its divisors is an integer number (30301320595).

Almost surely, 2^121201311013 is an apocalyptic number.

It is an amenable number.

121201311013 is a deficient number, since it is larger than the sum of its proper divisors (3971367).

121201311013 is an equidigital number, since it uses as much as digits as its factorization.

121201311013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971366.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121201311013 its reverse (310113102121), we get a palindrome (431314413134).

The spelling of 121201311013 in words is "one hundred twenty-one billion, two hundred one million, three hundred eleven thousand, thirteen".