1312220211 has 16 divisors (see below), whose sum is σ = 1798960128. Its totient is φ = 850305600.

The previous prime is 1312220201. The next prime is 1312220249. The reversal of 1312220211 is 1120222131.

It is not a de Polignac number, because 1312220211 - 2¹⁷ = 1312089139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13650 + ... + 53016.

It is an arithmetic number, because the mean of its divisors is an integer number (112435008).

Almost surely, 2^1312220211 is an apocalyptic number.

1312220211 is a deficient number, since it is larger than the sum of its proper divisors (486739917).

1312220211 is a wasteful number, since it uses less digits than its factorization.

1312220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39682.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1312220211 is about 36224.5802046069. The cubic root of 1312220211 is about 1094.8019799967.

Adding to 1312220211 its reverse (1120222131), we get a palindrome (2432442342).

It can be divided in two parts, 13122 and 20211, that added together give a palindrome (33333).

The spelling of 1312220211 in words is "one billion, three hundred twelve million, two hundred twenty thousand, two hundred eleven".