1312211322 has 12 divisors (see below), whose sum is σ = 2843124570. Its totient is φ = 437403768.

The previous prime is 1312211311. The next prime is 1312211323. The reversal of 1312211322 is 2231122131.

1312211322 is a `hidden beast` number, since 131 + 2 + 211 + 322 = 666.

1312211322 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1188801441 + 123409881 = 34479^2 + 11109^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 72900629 = 1312211322 / (1 + 3 + 1 + 2 + 2 + 1 + 1 + 3 + 2 + 2).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1312211295 and 1312211304.

It is not an unprimeable number, because it can be changed into a prime (1312211323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36450297 + ... + 36450332.

Almost surely, 2^1312211322 is an apocalyptic number.

1312211322 is an abundant number, since it is smaller than the sum of its proper divisors (1530913248).

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

1312211322 is a wasteful number, since it uses less digits than its factorization.

1312211322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72900637 (or 72900634 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1312211322 is about 36224.4575114659. The cubic root of 1312211322 is about 1094.7995079226.

Adding to 1312211322 its reverse (2231122131), we get a palindrome (3543333453).

The spelling of 1312211322 in words is "one billion, three hundred twelve million, two hundred eleven thousand, three hundred twenty-two".