212122349 has 4 divisors (see below), whose sum is σ = 212475900. Its totient is φ = 211768800.

The previous prime is 212122297. The next prime is 212122373. The reversal of 212122349 is 943221212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81180100 + 130942249 = 9010^2 + 11443^2 .

It is a cyclic number.

It is not a de Polignac number, because 212122349 - 2¹² = 212118253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122049) 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, 175874 + ... + 177075.

It is an arithmetic number, because the mean of its divisors is an integer number (53118975).

Almost surely, 2^212122349 is an apocalyptic number.

It is an amenable number.

212122349 is a deficient number, since it is larger than the sum of its proper divisors (353551).

212122349 is an equidigital number, since it uses as much as digits as its factorization.

212122349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353550.

The product of its digits is 1728, while the sum is 26.

The square root of 212122349 is about 14564.4206544579. The cubic root of 212122349 is about 596.3878803648.

The spelling of 212122349 in words is "two hundred twelve million, one hundred twenty-two thousand, three hundred forty-nine".