1222102011221 has 16 divisors (see below), whose sum is σ = 1504258850304. Its totient is φ = 966852163584.

The previous prime is 1222102011209. The next prime is 1222102011223. The reversal of 1222102011221 is 1221102012221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222102011221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222102011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222102011223) 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, 447380 + ... + 1626146.

It is an arithmetic number, because the mean of its divisors is an integer number (94016178144).

Almost surely, 2^{1222102011221} is an apocalyptic number.

It is an amenable number.

1222102011221 is a deficient number, since it is larger than the sum of its proper divisors (282156839083).

1222102011221 is a wasteful number, since it uses less digits than its factorization.

1222102011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190180.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222102011221 its reverse (1221102012221), we get a palindrome (2443204023442).

The spelling of 1222102011221 in words is "one trillion, two hundred twenty-two billion, one hundred two million, eleven thousand, two hundred twenty-one".