1311201210 has 64 divisors (see below), whose sum is σ = 3613662720. Its totient is φ = 301135680.

The previous prime is 1311201173. The next prime is 1311201217. The reversal of 1311201210 is 121021131.

It is a super-2 number, since 2×1311201210² = 3438497226210928200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311201217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98292 + ... + 110831.

It is an arithmetic number, because the mean of its divisors is an integer number (56463480).

Almost surely, 2^1311201210 is an apocalyptic number.

1311201210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311201210 is an abundant number, since it is smaller than the sum of its proper divisors (2302461510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311201210 is a wasteful number, since it uses less digits than its factorization.

1311201210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209163.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1311201210 is about 36210.5124238804. The cubic root of 1311201210 is about 1094.5185181202.

Adding to 1311201210 its reverse (121021131), we get a palindrome (1432222341).

The spelling of 1311201210 in words is "one billion, three hundred eleven million, two hundred one thousand, two hundred ten".