1312220202011 has 4 divisors (see below), whose sum is σ = 1312230789792. Its totient is φ = 1312209614232.

The previous prime is 1312220202001. The next prime is 1312220202037. The reversal of 1312220202011 is 1102020222131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312220202011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312220202001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105756 + ... + 5356601.

It is an arithmetic number, because the mean of its divisors is an integer number (328057697448).

Almost surely, 2^{1312220202011} is an apocalyptic number.

1312220202011 is a deficient number, since it is larger than the sum of its proper divisors (10587781).

1312220202011 is a wasteful number, since it uses less digits than its factorization.

1312220202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10587780.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1312220202011 its reverse (1102020222131), we get a palindrome (2414240424142).

The spelling of 1312220202011 in words is "one trillion, three hundred twelve billion, two hundred twenty million, two hundred two thousand, eleven".