1225120201 has 2 divisors, whose sum is σ = 1225120202. Its totient is φ = 1225120200.

The previous prime is 1225120199. The next prime is 1225120219. The reversal of 1225120201 is 1020215221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 619960201 + 605160000 = 24899^2 + 24600^2 .

It is an emirp because it is prime and its reverse (1020215221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225120201 - 2¹ = 1225120199 is a prime.

Together with 1225120199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1225120261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612560100 + 612560101.

It is an arithmetic number, because the mean of its divisors is an integer number (612560101).

Almost surely, 2^1225120201 is an apocalyptic number.

It is an amenable number.

1225120201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225120201 is an equidigital number, since it uses as much as digits as its factorization.

1225120201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1225120201 is about 35001.7171150217. The cubic root of 1225120201 is about 1070.0224763089.

Adding to 1225120201 its reverse (1020215221), we get a palindrome (2245335422).

The spelling of 1225120201 in words is "one billion, two hundred twenty-five million, one hundred twenty thousand, two hundred one".