1123402331 has 2 divisors, whose sum is σ = 1123402332. Its totient is φ = 1123402330.

The previous prime is 1123402307. The next prime is 1123402349. The reversal of 1123402331 is 1332043211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123402331 is a prime.

It is a super-2 number, since 2×1123402331² = 2524065594592467122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123462331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561701165 + 561701166.

It is an arithmetic number, because the mean of its divisors is an integer number (561701166).

Almost surely, 2^1123402331 is an apocalyptic number.

1123402331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123402331 is an equidigital number, since it uses as much as digits as its factorization.

1123402331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1123402331 is about 33517.1945574208. The cubic root of 1123402331 is about 1039.5493396931.

Adding to 1123402331 its reverse (1332043211), we get a palindrome (2455445542).

The spelling of 1123402331 in words is "one billion, one hundred twenty-three million, four hundred two thousand, three hundred thirty-one".