1122123421 has 2 divisors, whose sum is σ = 1122123422. Its totient is φ = 1122123420.

The previous prime is 1122123407. The next prime is 1122123439. The reversal of 1122123421 is 1243212211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1088076196 + 34047225 = 32986^2 + 5835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122123421 - 2⁷ = 1122123293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122123491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561061710 + 561061711.

It is an arithmetic number, because the mean of its divisors is an integer number (561061711).

Almost surely, 2^1122123421 is an apocalyptic number.

It is an amenable number.

1122123421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122123421 is an equidigital number, since it uses as much as digits as its factorization.

1122123421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 1122123421 is about 33498.1107079190. The cubic root of 1122123421 is about 1039.1547066997.

Adding to 1122123421 its reverse (1243212211), we get a palindrome (2365335632).

The spelling of 1122123421 in words is "one billion, one hundred twenty-two million, one hundred twenty-three thousand, four hundred twenty-one".