221210012201212 has 24 divisors (see below), whose sum is σ = 404666211309696. Its totient is φ = 105608177859888.

The previous prime is 221210012201183. The next prime is 221210012201273. The reversal of 221210012201212 is 212102210012122.

It is a self number, because there is not a number n which added to its sum of digits gives 221210012201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2135344878 + ... + 2135448469.

It is an arithmetic number, because the mean of its divisors is an integer number (16861092137904).

Almost surely, 2^{221210012201212} is an apocalyptic number.

It is an amenable number.

221210012201212 is a deficient number, since it is larger than the sum of its proper divisors (183456199108484).

221210012201212 is a wasteful number, since it uses less digits than its factorization.

221210012201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270793937 (or 4270793935 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221210012201212 its reverse (212102210012122), we get a palindrome (433312222213334).

The spelling of 221210012201212 in words is "two hundred twenty-one trillion, two hundred ten billion, twelve million, two hundred one thousand, two hundred twelve".