1022020012221 has 192 divisors, whose sum is σ = 1664743342080. Its totient is φ = 552053698560.

The previous prime is 1022020012171. The next prime is 1022020012289. The reversal of 1022020012221 is 1222100202201.

It is not a de Polignac number, because 1022020012221 - 2⁶ = 1022020012157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1022020012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022020012021) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3032700165 + ... + 3032700501.

It is an arithmetic number, because the mean of its divisors is an integer number (8670538240).

Almost surely, 2^{1022020012221} is an apocalyptic number.

It is an amenable number.

1022020012221 is a deficient number, since it is larger than the sum of its proper divisors (642723329859).

1022020012221 is a wasteful number, since it uses less digits than its factorization.

1022020012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1022020012221 its reverse (1222100202201), we get a palindrome (2244120214422).

The spelling of 1022020012221 in words is "one trillion, twenty-two billion, twenty million, twelve thousand, two hundred twenty-one".