412221421 has 4 divisors (see below), whose sum is σ = 422275644. Its totient is φ = 402167200.

The previous prime is 412221419. The next prime is 412221431. The reversal of 412221421 is 124122214.

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

It can be written as a sum of positive squares in 2 ways, for example, as 228916900 + 183304521 = 15130^2 + 13539^2 .

It is a cyclic number.

It is not a de Polignac number, because 412221421 - 2¹ = 412221419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412221431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5027050 + ... + 5027131.

It is an arithmetic number, because the mean of its divisors is an integer number (105568911).

Almost surely, 2^412221421 is an apocalyptic number.

412221421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

412221421 is a deficient number, since it is larger than the sum of its proper divisors (10054223).

412221421 is a wasteful number, since it uses less digits than its factorization.

412221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054222.

The product of its digits is 256, while the sum is 19.

The square root of 412221421 is about 20303.2367124062. The cubic root of 412221421 is about 744.2351629968.

Adding to 412221421 its reverse (124122214), we get a palindrome (536343635).

The spelling of 412221421 in words is "four hundred twelve million, two hundred twenty-one thousand, four hundred twenty-one".