1022221102220 has 12 divisors (see below), whose sum is σ = 2146664314704. Its totient is φ = 408888440880.

The previous prime is 1022221102193. The next prime is 1022221102229. The reversal of 1022221102220 is 222011222201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1022221102229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25555527536 + ... + 25555527575.

It is an arithmetic number, because the mean of its divisors is an integer number (178888692892).

Almost surely, 2^{1022221102220} is an apocalyptic number.

1022221102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022221102220 is an abundant number, since it is smaller than the sum of its proper divisors (1124443212484).

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

1022221102220 is a wasteful number, since it uses less digits than its factorization.

1022221102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51111055120 (or 51111055118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1022221102220 its reverse (222011222201), we get a palindrome (1244232324421).

The spelling of 1022221102220 in words is "one trillion, twenty-two billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty".