212122238 has 8 divisors (see below), whose sum is σ = 332017488. Its totient is φ = 101449744.

The previous prime is 212122237. The next prime is 212122241. The reversal of 212122238 is 832221212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122237) 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, 2305631 + ... + 2305722.

It is an arithmetic number, because the mean of its divisors is an integer number (41502186).

Almost surely, 2^212122238 is an apocalyptic number.

212122238 is a deficient number, since it is larger than the sum of its proper divisors (119895250).

212122238 is a wasteful number, since it uses less digits than its factorization.

212122238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611378.

The product of its digits is 768, while the sum is 23.

The square root of 212122238 is about 14564.4168438012. The cubic root of 212122238 is about 596.3877763382.

The spelling of 212122238 in words is "two hundred twelve million, one hundred twenty-two thousand, two hundred thirty-eight".