1123421107 has 2 divisors, whose sum is σ = 1123421108. Its totient is φ = 1123421106.

The previous prime is 1123421077. The next prime is 1123421129. The reversal of 1123421107 is 7011243211.

It is a happy number.

It is an a-pointer prime, because the next prime (1123421129) can be obtained adding 1123421107 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123421107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123421147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561710553 + 561710554.

It is an arithmetic number, because the mean of its divisors is an integer number (561710554).

Almost surely, 2^1123421107 is an apocalyptic number.

1123421107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123421107 is an equidigital number, since it uses as much as digits as its factorization.

1123421107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1123421107 is about 33517.4746512920. The cubic root of 1123421107 is about 1039.5551311681. Note that the first 3 decimals are identical.

Adding to 1123421107 its reverse (7011243211), we get a palindrome (8134664318).

The spelling of 1123421107 in words is "one billion, one hundred twenty-three million, four hundred twenty-one thousand, one hundred seven".