1020221112222 has 48 divisors (see below), whose sum is σ = 2420863688880. Its totient is φ = 308593604736.

The previous prime is 1020221112221. The next prime is 1020221112227. The reversal of 1020221112222 is 2222111220201.

It is a happy number.

It is a super-2 number, since 2×1020221112222² (a number of 25 digits) contains 22 as substring.

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 = 1020221112195 and 1020221112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020221112221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36934663 + ... + 36962274.

It is an arithmetic number, because the mean of its divisors is an integer number (50434660185).

Almost surely, 2^{1020221112222} is an apocalyptic number.

1020221112222 is an abundant number, since it is smaller than the sum of its proper divisors (1400642576658).

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

1020221112222 is a wasteful number, since it uses less digits than its factorization.

1020221112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73897017 (or 73897014 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1020221112222 its reverse (2222111220201), we get a palindrome (3242332332423).

The spelling of 1020221112222 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twenty-two".