2221000012221 has 8 divisors (see below), whose sum is σ = 2974378871904. Its totient is φ = 1474143913680.

The previous prime is 2221000012219. The next prime is 2221000012261. The reversal of 2221000012221 is 1222100001222.

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

It is not a de Polignac number, because 2221000012221 - 2¹ = 2221000012219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221000012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221000012211) 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, 1630689490 + ... + 1630690851.

It is an arithmetic number, because the mean of its divisors is an integer number (371797358988).

Almost surely, 2^{2221000012221} is an apocalyptic number.

It is an amenable number.

2221000012221 is a deficient number, since it is larger than the sum of its proper divisors (753378859683).

2221000012221 is a wasteful number, since it uses less digits than its factorization.

2221000012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261380571.

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

Adding to 2221000012221 its reverse (1222100001222), we get a palindrome (3443100013443).

The spelling of 2221000012221 in words is "two trillion, two hundred twenty-one billion, twelve thousand, two hundred twenty-one".