1021222110220 has 36 divisors (see below), whose sum is σ = 2322222829920. Its totient is φ = 377066624064.

The previous prime is 1021222110217. The next prime is 1021222110241. The reversal of 1021222110220 is 220112221201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021222110194 and 1021222110203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151064980 + ... + 151071739.

It is an arithmetic number, because the mean of its divisors is an integer number (64506189720).

Almost surely, 2^{1021222110220} is an apocalyptic number.

1021222110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021222110220 is an abundant number, since it is smaller than the sum of its proper divisors (1301000719700).

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

1021222110220 is a wasteful number, since it uses less digits than its factorization.

1021222110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302136754 (or 302136739 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021222110220 its reverse (220112221201), we get a palindrome (1241334331421).

The spelling of 1021222110220 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred ten thousand, two hundred twenty".