1220202222121 has 16 divisors (see below), whose sum is σ = 1282366770048. Its totient is φ = 1158817968000.

The previous prime is 1220202222119. The next prime is 1220202222157. The reversal of 1220202222121 is 1212222020221.

It is a cyclic number.

It is not a de Polignac number, because 1220202222121 - 2¹ = 1220202222119 is a prime.

It is a super-3 number, since 3×1220202222121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220202222181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2331046 + ... + 2806096.

It is an arithmetic number, because the mean of its divisors is an integer number (80147923128).

Almost surely, 2^{1220202222121} is an apocalyptic number.

It is an amenable number.

1220202222121 is a deficient number, since it is larger than the sum of its proper divisors (62164547927).

1220202222121 is a wasteful number, since it uses less digits than its factorization.

1220202222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475872.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1220202222121 its reverse (1212222020221), we get a palindrome (2432424242342).

The spelling of 1220202222121 in words is "one trillion, two hundred twenty billion, two hundred two million, two hundred twenty-two thousand, one hundred twenty-one".