1213113201 has 4 divisors (see below), whose sum is σ = 1617484272. Its totient is φ = 808742132.

The previous prime is 1213113199. The next prime is 1213113203. The reversal of 1213113201 is 1023113121.

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 an interprime number because it is at equal distance from previous prime (1213113199) and next prime (1213113203).

It is a cyclic number.

It is not a de Polignac number, because 1213113201 - 2¹ = 1213113199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213113203) 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, 202185531 + ... + 202185536.

It is an arithmetic number, because the mean of its divisors is an integer number (404371068).

Almost surely, 2^1213113201 is an apocalyptic number.

It is an amenable number.

1213113201 is a deficient number, since it is larger than the sum of its proper divisors (404371071).

1213113201 is an equidigital number, since it uses as much as digits as its factorization.

1213113201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404371070.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1213113201 is about 34829.7746332071. The cubic root of 1213113201 is about 1066.5153477513.

Adding to 1213113201 its reverse (1023113121), we get a palindrome (2236226322).

The spelling of 1213113201 in words is "one billion, two hundred thirteen million, one hundred thirteen thousand, two hundred one".