212012201001221 has 16 divisors (see below), whose sum is σ = 219371427684864. Its totient is φ = 204785406090624.

The previous prime is 212012201001137. The next prime is 212012201001241. The reversal of 212012201001221 is 122100102210212.

212012201001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212012201001221 - 2²⁶ = 212012133892357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012201001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012201001241) 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, 73317296 + ... + 76154121.

It is an arithmetic number, because the mean of its divisors is an integer number (13710714230304).

Almost surely, 2^{212012201001221} is an apocalyptic number.

It is an amenable number.

212012201001221 is a deficient number, since it is larger than the sum of its proper divisors (7359226683643).

212012201001221 is a wasteful number, since it uses less digits than its factorization.

212012201001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149471860.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212012201001221 its reverse (122100102210212), we get a palindrome (334112303211433).

The spelling of 212012201001221 in words is "two hundred twelve trillion, twelve billion, two hundred one million, one thousand, two hundred twenty-one".