212321055 has 16 divisors (see below), whose sum is σ = 343808640. Its totient is φ = 111872928.

The previous prime is 212321051. The next prime is 212321099. The reversal of 212321055 is 550123212.

It is not a de Polignac number, because 212321055 - 2² = 212321051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212321051) 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, 84025 + ... + 86514.

It is an arithmetic number, because the mean of its divisors is an integer number (21488040).

Almost surely, 2^212321055 is an apocalyptic number.

212321055 is a deficient number, since it is larger than the sum of its proper divisors (131487585).

212321055 is a wasteful number, since it uses less digits than its factorization.

212321055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170630.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 212321055 is about 14571.2406815617. The cubic root of 212321055 is about 596.5740447277.

Adding to 212321055 its reverse (550123212), we get a palindrome (762444267).

The spelling of 212321055 in words is "two hundred twelve million, three hundred twenty-one thousand, fifty-five".