1311213122011 has 8 divisors (see below), whose sum is σ = 1424571916320. Its totient is φ = 1199639505792.

The previous prime is 1311213122003. The next prime is 1311213122053. The reversal of 1311213122011 is 1102213121131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311213122011 - 2³ = 1311213122003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311213122011.

It is not an unprimeable number, because it can be changed into a prime (1311213122911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446292991 + ... + 446295928.

It is an arithmetic number, because the mean of its divisors is an integer number (178071489540).

Almost surely, 2^{1311213122011} is an apocalyptic number.

1311213122011 is a deficient number, since it is larger than the sum of its proper divisors (113358794309).

1311213122011 is a wasteful number, since it uses less digits than its factorization.

1311213122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892589045.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1311213122011 its reverse (1102213121131), we get a palindrome (2413426243142).

The spelling of 1311213122011 in words is "one trillion, three hundred eleven billion, two hundred thirteen million, one hundred twenty-two thousand, eleven".