1220222211121 has 8 divisors (see below), whose sum is σ = 1220988621600. Its totient is φ = 1219456045920.

The previous prime is 1220222211097. The next prime is 1220222211127. The reversal of 1220222211121 is 1211122220221.

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 1220222211121 - 2¹³ = 1220222202929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220222211127) 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, 10449226 + ... + 10565356.

It is an arithmetic number, because the mean of its divisors is an integer number (152623577700).

Almost surely, 2^{1220222211121} is an apocalyptic number.

It is an amenable number.

1220222211121 is a deficient number, since it is larger than the sum of its proper divisors (766410479).

1220222211121 is a wasteful number, since it uses less digits than its factorization.

1220222211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122639.

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

Adding to 1220222211121 its reverse (1211122220221), we get a palindrome (2431344431342).

The spelling of 1220222211121 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-one".