1321011310111 has 8 divisors (see below), whose sum is σ = 1337043464064. Its totient is φ = 1304981926680.

The previous prime is 1321011310057. The next prime is 1321011310127. The reversal of 1321011310111 is 1110131101231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321011310111 - 2¹⁷ = 1321011179039 is a prime.

It is a super-2 number, since 2×1321011310111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321011310141) 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, 274926 + ... + 1648516.

It is an arithmetic number, because the mean of its divisors is an integer number (167130433008).

Almost surely, 2^{1321011310111} is an apocalyptic number.

1321011310111 is a deficient number, since it is larger than the sum of its proper divisors (16032153953).

1321011310111 is a wasteful number, since it uses less digits than its factorization.

1321011310111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385261.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1321011310111 its reverse (1110131101231), we get a palindrome (2431142411342).

The spelling of 1321011310111 in words is "one trillion, three hundred twenty-one billion, eleven million, three hundred ten thousand, one hundred eleven".