212321146 has 4 divisors (see below), whose sum is σ = 318481722. Its totient is φ = 106160572.

The previous prime is 212321129. The next prime is 212321167. The reversal of 212321146 is 641123212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125104225 + 87216921 = 11185^2 + 9339^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53080285 + ... + 53080288.

Almost surely, 2^212321146 is an apocalyptic number.

212321146 is a deficient number, since it is larger than the sum of its proper divisors (106160576).

212321146 is a wasteful number, since it uses less digits than its factorization.

212321146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106160575.

The product of its digits is 576, while the sum is 22.

The square root of 212321146 is about 14571.2438041507. The cubic root of 212321146 is about 596.5741299574.

Adding to 212321146 its reverse (641123212), we get a palindrome (853444358).

The spelling of 212321146 in words is "two hundred twelve million, three hundred twenty-one thousand, one hundred forty-six".