2222001001221 has 8 divisors (see below), whose sum is σ = 3012882713760. Its totient is φ = 1456226644752.

The previous prime is 2222001001061. The next prime is 2222001001271. The reversal of 2222001001221 is 1221001002222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2222001001221 - 2²² = 2221996806917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2222001001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222001001271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6276838810 + ... + 6276839163.

It is an arithmetic number, because the mean of its divisors is an integer number (376610339220).

Almost surely, 2^{2222001001221} is an apocalyptic number.

It is an amenable number.

2222001001221 is a deficient number, since it is larger than the sum of its proper divisors (790881712539).

2222001001221 is a wasteful number, since it uses less digits than its factorization.

2222001001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12553678035.

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

Adding to 2222001001221 its reverse (1221001002222), we get a palindrome (3443002003443).

The spelling of 2222001001221 in words is "two trillion, two hundred twenty-two billion, one million, one thousand, two hundred twenty-one".