234121421 has 2 divisors, whose sum is σ = 234121422. Its totient is φ = 234121420.

The previous prime is 234121409. The next prime is 234121451. The reversal of 234121421 is 124121432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 41744521 = 13870^2 + 6461^2 .

It is a cyclic number.

It is not a de Polignac number, because 234121421 - 2¹⁴ = 234105037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 234121393 and 234121402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234121451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117060710 + 117060711.

It is an arithmetic number, because the mean of its divisors is an integer number (117060711).

Almost surely, 2^234121421 is an apocalyptic number.

It is an amenable number.

234121421 is a deficient number, since it is larger than the sum of its proper divisors (1).

234121421 is an equidigital number, since it uses as much as digits as its factorization.

234121421 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 234121421 is about 15301.0267956108. The cubic root of 234121421 is about 616.3305811541.

Adding to 234121421 its reverse (124121432), we get a palindrome (358242853).

The spelling of 234121421 in words is "two hundred thirty-four million, one hundred twenty-one thousand, four hundred twenty-one".