1312222011 has 4 divisors (see below), whose sum is σ = 1749629352. Its totient is φ = 874814672.

The previous prime is 1312222003. The next prime is 1312222019. The reversal of 1312222011 is 1102222131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102222131 = 3 ⋅367407377.

It is an interprime number because it is at equal distance from previous prime (1312222003) and next prime (1312222019).

It is a cyclic number.

It is not a de Polignac number, because 1312222011 - 2³ = 1312222003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218703666 + ... + 218703671.

It is an arithmetic number, because the mean of its divisors is an integer number (437407338).

Almost surely, 2^1312222011 is an apocalyptic number.

1312222011 is a deficient number, since it is larger than the sum of its proper divisors (437407341).

1312222011 is an equidigital number, since it uses as much as digits as its factorization.

1312222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437407340.

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

The square root of 1312222011 is about 36224.6050496068. The cubic root of 1312222011 is about 1094.8024805841.

Adding to 1312222011 its reverse (1102222131), we get a palindrome (2414444142).

The spelling of 1312222011 in words is "one billion, three hundred twelve million, two hundred twenty-two thousand, eleven".