220401212 has 12 divisors (see below), whose sum is σ = 388647336. Its totient is φ = 109359120.

The previous prime is 220401173. The next prime is 220401221. The reversal of 220401212 is 212104022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209783 + ... + 210830.

It is an arithmetic number, because the mean of its divisors is an integer number (32387278).

Almost surely, 2^220401212 is an apocalyptic number.

It is an amenable number.

220401212 is a deficient number, since it is larger than the sum of its proper divisors (168246124).

220401212 is a wasteful number, since it uses less digits than its factorization.

220401212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420748 (or 420746 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 220401212 is about 14845.9156672803. The cubic root of 220401212 is about 604.0478267173.

Adding to 220401212 its reverse (212104022), we get a palindrome (432505234).

The spelling of 220401212 in words is "two hundred twenty million, four hundred one thousand, two hundred twelve".