1020202222221 has 72 divisors (see below), whose sum is σ = 1864038443904. Its totient is φ = 523584051840.

The previous prime is 1020202222163. The next prime is 1020202222223. The reversal of 1020202222221 is 1222222020201.

1020202222221 is a `hidden beast` number, since 1 + 0 + 20 + 202 + 222 + 221 = 666.

It is not a de Polignac number, because 1020202222221 - 2⁷ = 1020202222093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020202222194 and 1020202222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020202222223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 666256 + ... + 1576166.

It is an arithmetic number, because the mean of its divisors is an integer number (25889422832).

Almost surely, 2^{1020202222221} is an apocalyptic number.

It is an amenable number.

1020202222221 is a deficient number, since it is larger than the sum of its proper divisors (843836221683).

1020202222221 is a wasteful number, since it uses less digits than its factorization.

1020202222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910011 (or 909971 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1020202222221 its reverse (1222222020201), we get a palindrome (2242424242422).

The spelling of 1020202222221 in words is "one trillion, twenty billion, two hundred two million, two hundred twenty-two thousand, two hundred twenty-one".