212116377 has 32 divisors (see below), whose sum is σ = 319689216. Its totient is φ = 123984000.

The previous prime is 212116369. The next prime is 212116381. The reversal of 212116377 is 773611212.

It is not a de Polignac number, because 212116377 - 2³ = 212116369 is a prime.

It is a super-2 number, since 2×212116377² = 89986714783212258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212116357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116877 + ... + 118677.

It is an arithmetic number, because the mean of its divisors is an integer number (9990288).

Almost surely, 2^212116377 is an apocalyptic number.

It is an amenable number.

212116377 is a deficient number, since it is larger than the sum of its proper divisors (107572839).

212116377 is a wasteful number, since it uses less digits than its factorization.

212116377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941.

The product of its digits is 3528, while the sum is 30.

The square root of 212116377 is about 14564.2156328448. The cubic root of 212116377 is about 596.3822834976.

Adding to 212116377 its reverse (773611212), we get a palindrome (985727589).

The spelling of 212116377 in words is "two hundred twelve million, one hundred sixteen thousand, three hundred seventy-seven".