1215250201 has 4 divisors (see below), whose sum is σ = 1325727504. Its totient is φ = 1104772900.

The previous prime is 1215250187. The next prime is 1215250207. The reversal of 1215250201 is 1020525121.

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 not a de Polignac number, because 1215250201 - 2⁷ = 1215250073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215250207) 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, 55238635 + ... + 55238656.

It is an arithmetic number, because the mean of its divisors is an integer number (331431876).

Almost surely, 2^1215250201 is an apocalyptic number.

1215250201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1215250201 is a deficient number, since it is larger than the sum of its proper divisors (110477303).

1215250201 is a wasteful number, since it uses less digits than its factorization.

1215250201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110477302.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1215250201 is about 34860.4389100310. The cubic root of 1215250201 is about 1067.1412322673.

Adding to 1215250201 its reverse (1020525121), we get a palindrome (2235775322).

The spelling of 1215250201 in words is "one billion, two hundred fifteen million, two hundred fifty thousand, two hundred one".