1220220022122 has 24 divisors (see below), whose sum is σ = 2643831043776. Its totient is φ = 406736777256.

The previous prime is 1220220022121. The next prime is 1220220022213. The reversal of 1220220022122 is 2212200220221.

1220220022122 is a `hidden beast` number, since 1 + 220 + 2 + 200 + 221 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1220220022095 and 1220220022104.

It is not an unprimeable number, because it can be changed into a prime (1220220022121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3446863 + ... + 3784349.

It is an arithmetic number, because the mean of its divisors is an integer number (110159626824).

Almost surely, 2^{1220220022122} is an apocalyptic number.

1220220022122 is an abundant number, since it is smaller than the sum of its proper divisors (1423611021654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220220022122 is a wasteful number, since it uses less digits than its factorization.

1220220022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538362 (or 538359 counting only the distinct ones).

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

Adding to 1220220022122 its reverse (2212200220221), we get a palindrome (3432420242343).

The spelling of 1220220022122 in words is "one trillion, two hundred twenty billion, two hundred twenty million, twenty-two thousand, one hundred twenty-two".