321124421 has 2 divisors, whose sum is σ = 321124422. Its totient is φ = 321124420.

The previous prime is 321124411. The next prime is 321124429. The reversal of 321124421 is 124421123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258888100 + 62236321 = 16090^2 + 7889^2 .

It is a cyclic number.

It is not a de Polignac number, because 321124421 - 2⁶ = 321124357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321124393 and 321124402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321124429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160562210 + 160562211.

It is an arithmetic number, because the mean of its divisors is an integer number (160562211).

Almost surely, 2^321124421 is an apocalyptic number.

It is an amenable number.

321124421 is a deficient number, since it is larger than the sum of its proper divisors (1).

321124421 is an equidigital number, since it uses as much as digits as its factorization.

321124421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 321124421 is about 17919.9447822810. The cubic root of 321124421 is about 684.7905808403.

Adding to 321124421 its reverse (124421123), we get a palindrome (445545544).

The spelling of 321124421 in words is "three hundred twenty-one million, one hundred twenty-four thousand, four hundred twenty-one".