1131213023 has 2 divisors, whose sum is σ = 1131213024. Its totient is φ = 1131213022.

The previous prime is 1131213019. The next prime is 1131213043. The reversal of 1131213023 is 3203121311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131213023 - 2² = 1131213019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131212992 and 1131213010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131213043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565606511 + 565606512.

It is an arithmetic number, because the mean of its divisors is an integer number (565606512).

Almost surely, 2^1131213023 is an apocalyptic number.

1131213023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131213023 is an equidigital number, since it uses as much as digits as its factorization.

1131213023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1131213023 is about 33633.5104174393. The cubic root of 1131213023 is about 1041.9530063920.

Adding to 1131213023 its reverse (3203121311), we get a palindrome (4334334334).

The spelling of 1131213023 in words is "one billion, one hundred thirty-one million, two hundred thirteen thousand, twenty-three".