1222221021121 has 8 divisors (see below), whose sum is σ = 1225406527488. Its totient is φ = 1219036200000.

The previous prime is 1222221021113. The next prime is 1222221021191. The reversal of 1222221021121 is 1211201222221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222221021121 - 2³ = 1222221021113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222221021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3503016 + ... + 3836086.

It is an arithmetic number, because the mean of its divisors is an integer number (153175815936).

Almost surely, 2^{1222221021121} is an apocalyptic number.

It is an amenable number.

1222221021121 is a deficient number, since it is larger than the sum of its proper divisors (3185506367).

1222221021121 is an equidigital number, since it uses as much as digits as its factorization.

1222221021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342623.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1222221021121 its reverse (1211201222221), we get a palindrome (2433422243342).

The spelling of 1222221021121 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, one hundred twenty-one".