1111320123121 has 4 divisors (see below), whose sum is σ = 1196806286452. Its totient is φ = 1025833959792.

The previous prime is 1111320123119. The next prime is 1111320123127. The reversal of 1111320123121 is 1213210231111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 567950640625 + 543369482496 = 753625^2 + 737136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111320123121 - 2¹ = 1111320123119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111320123127) 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, 42743081646 + ... + 42743081671.

It is an arithmetic number, because the mean of its divisors is an integer number (299201571613).

Almost surely, 2^{1111320123121} is an apocalyptic number.

It is an amenable number.

1111320123121 is a deficient number, since it is larger than the sum of its proper divisors (85486163331).

1111320123121 is an equidigital number, since it uses as much as digits as its factorization.

1111320123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85486163330.

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

Adding to 1111320123121 its reverse (1213210231111), we get a palindrome (2324530354232).

The spelling of 1111320123121 in words is "one trillion, one hundred eleven billion, three hundred twenty million, one hundred twenty-three thousand, one hundred twenty-one".