222012001221 has 16 divisors (see below), whose sum is σ = 306238656000. Its totient is φ = 142897180608.

The previous prime is 222012001201. The next prime is 222012001349. The reversal of 222012001221 is 122100210222.

It is not a de Polignac number, because 222012001221 - 2⁶ = 222012001157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222012001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222012001201) 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, 2134380 + ... + 2235978.

It is an arithmetic number, because the mean of its divisors is an integer number (19139916000).

Almost surely, 2^222012001221 is an apocalyptic number.

It is an amenable number.

222012001221 is a deficient number, since it is larger than the sum of its proper divisors (84226654779).

222012001221 is a wasteful number, since it uses less digits than its factorization.

222012001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126748.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222012001221 its reverse (122100210222), we get a palindrome (344112211443).

The spelling of 222012001221 in words is "two hundred twenty-two billion, twelve million, one thousand, two hundred twenty-one".