1312401211 has 24 divisors (see below), whose sum is σ = 1509771312. Its totient is φ = 1138737600.

The previous prime is 1312401191. The next prime is 1312401217. The reversal of 1312401211 is 1121042131.

It is not a de Polignac number, because 1312401211 - 2¹⁷ = 1312270139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312401217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234516 + ... + 240046.

It is an arithmetic number, because the mean of its divisors is an integer number (62907138).

Almost surely, 2^1312401211 is an apocalyptic number.

1312401211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312401211 is a deficient number, since it is larger than the sum of its proper divisors (197370101).

1312401211 is a wasteful number, since it uses less digits than its factorization.

1312401211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643 (or 5632 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1312401211 is about 36227.0784220864. The cubic root of 1312401211 is about 1094.8523145484.

Adding to 1312401211 its reverse (1121042131), we get a palindrome (2433443342).

The spelling of 1312401211 in words is "one billion, three hundred twelve million, four hundred one thousand, two hundred eleven".