1312222011111 has 48 divisors (see below), whose sum is σ = 2085077449728. Its totient is φ = 788641963200.

The previous prime is 1312222011109. The next prime is 1312222011131. The reversal of 1312222011111 is 1111102222131.

It is a happy number.

1312222011111 is a `hidden beast` number, since 131 + 222 + 201 + 1 + 111 = 666.

It is not a de Polignac number, because 1312222011111 - 2¹ = 1312222011109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312222011131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6866130 + ... + 7054656.

It is an arithmetic number, because the mean of its divisors is an integer number (43439113536).

Almost surely, 2^{1312222011111} is an apocalyptic number.

1312222011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312222011111 is a deficient number, since it is larger than the sum of its proper divisors (772855438617).

1312222011111 is a wasteful number, since it uses less digits than its factorization.

1312222011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189132 (or 189129 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1312222011111 its reverse (1111102222131), we get a palindrome (2423324233242).

The spelling of 1312222011111 in words is "one trillion, three hundred twelve billion, two hundred twenty-two million, eleven thousand, one hundred eleven".