212122042 has 32 divisors (see below), whose sum is σ = 366405120. Its totient is φ = 91087920.

The previous prime is 212122019. The next prime is 212122049. The reversal of 212122042 is 240221212.

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 15 ways as a sum of consecutive naturals, for example, 285123 + ... + 285865.

It is an arithmetic number, because the mean of its divisors is an integer number (11450160).

Almost surely, 2^212122042 is an apocalyptic number.

212122042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212122042 is a deficient number, since it is larger than the sum of its proper divisors (154283078).

212122042 is a wasteful number, since it uses less digits than its factorization.

212122042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 212122042 is about 14564.4101150716. The cubic root of 212122042 is about 596.3875926516.

Adding to 212122042 its reverse (240221212), we get a palindrome (452343254).

The spelling of 212122042 in words is "two hundred twelve million, one hundred twenty-two thousand, forty-two".