212111361 has 48 divisors (see below), whose sum is σ = 384703488. Its totient is φ = 109404000.

The previous prime is 212111323. The next prime is 212111369. The reversal of 212111361 is 163111212.

It is not a de Polignac number, because 212111361 - 2⁹ = 212110849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212111369) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103630 + ... + 105656.

It is an arithmetic number, because the mean of its divisors is an integer number (8014656).

Almost surely, 2^212111361 is an apocalyptic number.

212111361 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212111361 is a deficient number, since it is larger than the sum of its proper divisors (172592127).

212111361 is a wasteful number, since it uses less digits than its factorization.

212111361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2199 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 212111361 is about 14564.0434289383. The cubic root of 212111361 is about 596.3775824978.

Adding to 212111361 its reverse (163111212), we get a palindrome (375222573).

The spelling of 212111361 in words is "two hundred twelve million, one hundred eleven thousand, three hundred sixty-one".