1022120012221 has 24 divisors (see below), whose sum is σ = 1287074498112. Its totient is φ = 788570832000.

The previous prime is 1022120012143. The next prime is 1022120012233. The reversal of 1022120012221 is 1222100212201.

It is a happy number.

It is not a de Polignac number, because 1022120012221 - 2⁷ = 1022120012093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022120012195 and 1022120012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022120012321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134841 + ... + 1436113.

It is an arithmetic number, because the mean of its divisors is an integer number (53628104088).

Almost surely, 2^{1022120012221} is an apocalyptic number.

1022120012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022120012221 is a deficient number, since it is larger than the sum of its proper divisors (264954485891).

1022120012221 is a wasteful number, since it uses less digits than its factorization.

1022120012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301493 (or 1301392 counting only the distinct ones).

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

Adding to 1022120012221 its reverse (1222100212201), we get a palindrome (2244220224422).

The spelling of 1022120012221 in words is "one trillion, twenty-two billion, one hundred twenty million, twelve thousand, two hundred twenty-one".