421111213 has 2 divisors, whose sum is σ = 421111214. Its totient is φ = 421111212.

The previous prime is 421111183. The next prime is 421111217. The reversal of 421111213 is 312111124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301821129 + 119290084 = 17373^2 + 10922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421111213 is a prime.

It is a super-3 number, since 3×421111213³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421111217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210555606 + 210555607.

It is an arithmetic number, because the mean of its divisors is an integer number (210555607).

Almost surely, 2^421111213 is an apocalyptic number.

It is an amenable number.

421111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

421111213 is an equidigital number, since it uses as much as digits as its factorization.

421111213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 16.

The square root of 421111213 is about 20520.9944447144. The cubic root of 421111213 is about 749.5471120599.

Adding to 421111213 its reverse (312111124), we get a palindrome (733222337).

It can be divided in two parts, 42111121 and 3, that added together give a palindrome (42111124).

The spelling of 421111213 in words is "four hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".