1340111023 has 4 divisors (see below), whose sum is σ = 1348646920. Its totient is φ = 1331575128.

The previous prime is 1340111009. The next prime is 1340111033. The reversal of 1340111023 is 3201110431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3201110431 = 59 ⋅54256109.

It is a cyclic number.

It is not a de Polignac number, because 1340111023 - 2⁵ = 1340110991 is a prime.

It is a super-2 number, since 2×1340111023² = 3591795107932213058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340110988 and 1340111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340111033) 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, 4267713 + ... + 4268026.

It is an arithmetic number, because the mean of its divisors is an integer number (337161730).

Almost surely, 2^1340111023 is an apocalyptic number.

1340111023 is a deficient number, since it is larger than the sum of its proper divisors (8535897).

1340111023 is an equidigital number, since it uses as much as digits as its factorization.

1340111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535896.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1340111023 is about 36607.5268626549. The cubic root of 1340111023 is about 1102.5042183565.

Adding to 1340111023 its reverse (3201110431), we get a palindrome (4541221454).

The spelling of 1340111023 in words is "one billion, three hundred forty million, one hundred eleven thousand, twenty-three".