1022021122221 has 48 divisors (see below), whose sum is σ = 1617874614720. Its totient is φ = 616559074560.

The previous prime is 1022021122219. The next prime is 1022021122273. The reversal of 1022021122221 is 1222211202201.

It is a happy number.

1022021122221 is a `hidden beast` number, since 10 + 220 + 211 + 2 + 2 + 221 = 666.

It is not a de Polignac number, because 1022021122221 - 2¹ = 1022021122219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022021122194 and 1022021122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022021122321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24896505 + ... + 24937521.

It is an arithmetic number, because the mean of its divisors is an integer number (33705721140).

Almost surely, 2^{1022021122221} is an apocalyptic number.

1022021122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022021122221 is a deficient number, since it is larger than the sum of its proper divisors (595853492499).

1022021122221 is a wasteful number, since it uses less digits than its factorization.

1022021122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42186 (or 42183 counting only the distinct ones).

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

Adding to 1022021122221 its reverse (1222211202201), we get a palindrome (2244232324422).

The spelling of 1022021122221 in words is "one trillion, twenty-two billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".