420122231 has 4 divisors (see below), whose sum is σ = 422699832. Its totient is φ = 417544632.

The previous prime is 420122221. The next prime is 420122267. The reversal of 420122231 is 132221024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420122231 - 2¹⁸ = 419860087 is a prime.

It is a super-2 number, since 2×420122231² = 353005377960834722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420122201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288556 + ... + 1288881.

It is an arithmetic number, because the mean of its divisors is an integer number (105674958).

Almost surely, 2^420122231 is an apocalyptic number.

420122231 is a deficient number, since it is larger than the sum of its proper divisors (2577601).

420122231 is a wasteful number, since it uses less digits than its factorization.

420122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577600.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 420122231 is about 20496.8834460266. The cubic root of 420122231 is about 748.9598802755.

Adding to 420122231 its reverse (132221024), we get a palindrome (552343255).

The spelling of 420122231 in words is "four hundred twenty million, one hundred twenty-two thousand, two hundred thirty-one".