1021222012220 has 24 divisors (see below), whose sum is σ = 2163544692624. Its totient is φ = 404873858816.

The previous prime is 1021222012211. The next prime is 1021222012231. The reversal of 1021222012220 is 222102221201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225931814 + ... + 225936333.

It is an arithmetic number, because the mean of its divisors is an integer number (90147695526).

Almost surely, 2^{1021222012220} is an apocalyptic number.

1021222012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021222012220 is an abundant number, since it is smaller than the sum of its proper divisors (1142322680404).

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

1021222012220 is a wasteful number, since it uses less digits than its factorization.

1021222012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451868269 (or 451868267 counting only the distinct ones).

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

Adding to 1021222012220 its reverse (222102221201), we get a palindrome (1243324233421).

The spelling of 1021222012220 in words is "one trillion, twenty-one billion, two hundred twenty-two million, twelve thousand, two hundred twenty".