1220022022221 has 16 divisors (see below), whose sum is σ = 1807538729920. Its totient is φ = 813303601200.

The previous prime is 1220022022199. The next prime is 1220022022229. The reversal of 1220022022221 is 1222202200221.

1220022022221 is a `hidden beast` number, since 1 + 2 + 200 + 220 + 22 + 221 = 666.

It is not a de Polignac number, because 1220022022221 - 2⁶ = 1220022022157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220022022194 and 1220022022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220022022229) 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, 726310 + ... + 1722663.

It is an arithmetic number, because the mean of its divisors is an integer number (112971170620).

Almost surely, 2^{1220022022221} is an apocalyptic number.

It is an amenable number.

1220022022221 is a deficient number, since it is larger than the sum of its proper divisors (587516707699).

1220022022221 is a wasteful number, since it uses less digits than its factorization.

1220022022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467433 (or 2467427 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1220022022221 its reverse (1222202200221), we get a palindrome (2442224222442).

The spelling of 1220022022221 in words is "one trillion, two hundred twenty billion, twenty-two million, twenty-two thousand, two hundred twenty-one".