1222012122021 has 32 divisors (see below), whose sum is σ = 1907804931840. Its totient is φ = 771538680000.

The previous prime is 1222012121999. The next prime is 1222012122029. The reversal of 1222012122021 is 1202212102221.

It is a happy number.

It is not a de Polignac number, because 1222012122021 - 2⁵ = 1222012121989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1222012121985 and 1222012122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222012122029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9678930 + ... + 9804371.

It is an arithmetic number, because the mean of its divisors is an integer number (59618904120).

Almost surely, 2^{1222012122021} is an apocalyptic number.

It is an amenable number.

1222012122021 is a deficient number, since it is larger than the sum of its proper divisors (685792809819).

1222012122021 is a wasteful number, since it uses less digits than its factorization.

1222012122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19483434 (or 19483428 counting only the distinct ones).

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

Adding to 1222012122021 its reverse (1202212102221), we get a palindrome (2424224224242).

The spelling of 1222012122021 in words is "one trillion, two hundred twenty-two billion, twelve million, one hundred twenty-two thousand, twenty-one".