421221214 has 4 divisors (see below), whose sum is σ = 631831824. Its totient is φ = 210610606.

The previous prime is 421221193. The next prime is 421221217. The reversal of 421221214 is 412122124.

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

It is a super-2 number, since 2×421221214² = 354854622247267592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421221191 and 421221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421221217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105305302 + ... + 105305305.

It is an arithmetic number, because the mean of its divisors is an integer number (157957956).

Almost surely, 2^421221214 is an apocalyptic number.

421221214 is a deficient number, since it is larger than the sum of its proper divisors (210610610).

421221214 is a wasteful number, since it uses less digits than its factorization.

421221214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210610609.

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

The square root of 421221214 is about 20523.6744760776. The cubic root of 421221214 is about 749.6123709521.

Adding to 421221214 its reverse (412122124), we get a palindrome (833343338).

The spelling of 421221214 in words is "four hundred twenty-one million, two hundred twenty-one thousand, two hundred fourteen".