212001221204 has 24 divisors (see below), whose sum is σ = 372210370560. Its totient is φ = 105655919264.

The previous prime is 212001221189. The next prime is 212001221239. The reversal of 212001221204 is 402122100212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1589402 + ... + 1717614.

It is an arithmetic number, because the mean of its divisors is an integer number (15508765440).

Almost surely, 2^212001221204 is an apocalyptic number.

It is an amenable number.

212001221204 is a deficient number, since it is larger than the sum of its proper divisors (160209149356).

212001221204 is a wasteful number, since it uses less digits than its factorization.

212001221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129559 (or 129557 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212001221204 its reverse (402122100212), we get a palindrome (614123321416).

The spelling of 212001221204 in words is "two hundred twelve billion, one million, two hundred twenty-one thousand, two hundred four".