222102211021221 has 16 divisors (see below), whose sum is σ = 304140717440064. Its totient is φ = 144065942452224.

The previous prime is 222102211021219. The next prime is 222102211021279. The reversal of 222102211021221 is 122120112201222.

It is not a de Polignac number, because 222102211021221 - 2¹ = 222102211021219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222102211021291) 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, 47004826 + ... + 51513668.

It is an arithmetic number, because the mean of its divisors is an integer number (19008794840004).

Almost surely, 2^{222102211021221} is an apocalyptic number.

It is an amenable number.

222102211021221 is a deficient number, since it is larger than the sum of its proper divisors (82038506418843).

222102211021221 is a wasteful number, since it uses less digits than its factorization.

222102211021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952660.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222102211021221 its reverse (122120112201222), we get a palindrome (344222323222443).

The spelling of 222102211021221 in words is "two hundred twenty-two trillion, one hundred two billion, two hundred eleven million, twenty-one thousand, two hundred twenty-one".