1213055201 has 4 divisors (see below), whose sum is σ = 1216491972. Its totient is φ = 1209618432.

The previous prime is 1213055197. The next prime is 1213055227. The reversal of 1213055201 is 1025503121.

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: 1025503121 = 17 ⋅60323713.

It can be written as a sum of positive squares in 2 ways, for example, as 510805201 + 702250000 = 22601^2 + 26500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213055201 - 2² = 1213055197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213055401) 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, 1717856 + ... + 1718561.

It is an arithmetic number, because the mean of its divisors is an integer number (304122993).

Almost surely, 2^1213055201 is an apocalyptic number.

It is an amenable number.

1213055201 is a deficient number, since it is larger than the sum of its proper divisors (3436771).

1213055201 is an equidigital number, since it uses as much as digits as its factorization.

1213055201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436770.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1213055201 is about 34828.9420023061. The cubic root of 1213055201 is about 1066.4983504708.

Adding to 1213055201 its reverse (1025503121), we get a palindrome (2238558322).

The spelling of 1213055201 in words is "one billion, two hundred thirteen million, fifty-five thousand, two hundred one".