212121212158 has 32 divisors (see below), whose sum is σ = 327864390336. Its totient is φ = 102852592128.

The previous prime is 212121212123. The next prime is 212121212159. The reversal of 212121212158 is 851212121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121212159) 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, 39184660 + ... + 39190072.

It is an arithmetic number, because the mean of its divisors is an integer number (10245762198).

Almost surely, 2^212121212158 is an apocalyptic number.

212121212158 is a deficient number, since it is larger than the sum of its proper divisors (115743178178).

212121212158 is a wasteful number, since it uses less digits than its factorization.

212121212158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7108.

The product of its digits is 1280, while the sum is 28.

The spelling of 212121212158 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, one hundred fifty-eight".