1321001234011 has 4 divisors (see below), whose sum is σ = 1321004167024. Its totient is φ = 1320998301000.

The previous prime is 1321001234009. The next prime is 1321001234053. The reversal of 1321001234011 is 1104321001231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321001234011 - 2¹ = 1321001234009 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 1321001234011.

It is not an unprimeable number, because it can be changed into a prime (1321001234071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633015 + ... + 1744336.

It is an arithmetic number, because the mean of its divisors is an integer number (330251041756).

Almost surely, 2^{1321001234011} is an apocalyptic number.

1321001234011 is a deficient number, since it is larger than the sum of its proper divisors (2933013).

1321001234011 is an equidigital number, since it uses as much as digits as its factorization.

1321001234011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933012.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1321001234011 its reverse (1104321001231), we get a palindrome (2425322235242).

The spelling of 1321001234011 in words is "one trillion, three hundred twenty-one billion, one million, two hundred thirty-four thousand, eleven".