1311022201 has 12 divisors (see below), whose sum is σ = 1395622000. Its totient is φ = 1231295040.

The previous prime is 1311022177. The next prime is 1311022217. The reversal of 1311022201 is 1022201131.

It is not a de Polignac number, because 1311022201 - 2²³ = 1302633593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311022501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139666 + ... + 148756.

Almost surely, 2^1311022201 is an apocalyptic number.

It is an amenable number.

1311022201 is a deficient number, since it is larger than the sum of its proper divisors (84599799).

1311022201 is an equidigital number, since it uses as much as digits as its factorization.

1311022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624 (or 9607 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1311022201 is about 36208.0405573127. The cubic root of 1311022201 is about 1094.4687069036.

Adding to 1311022201 its reverse (1022201131), we get a palindrome (2333223332).

The spelling of 1311022201 in words is "one billion, three hundred eleven million, twenty-two thousand, two hundred one".