212122403 has 8 divisors (see below), whose sum is σ = 224160720. Its totient is φ = 200171520.

The previous prime is 212122381. The next prime is 212122433. The reversal of 212122403 is 304221212.

212122403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 212122403 - 2¹⁰ = 212121379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212122433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16838 + ... + 26603.

It is an arithmetic number, because the mean of its divisors is an integer number (28020090).

Almost surely, 2^212122403 is an apocalyptic number.

212122403 is a deficient number, since it is larger than the sum of its proper divisors (12038317).

212122403 is a wasteful number, since it uses less digits than its factorization.

212122403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43717.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212122403 is about 14564.4225082905. The cubic root of 212122403 is about 596.3879309722.

Adding to 212122403 its reverse (304221212), we get a palindrome (516343615).

The spelling of 212122403 in words is "two hundred twelve million, one hundred twenty-two thousand, four hundred three".