1222021012122 has 48 divisors (see below), whose sum is σ = 2747155494720. Its totient is φ = 407135629152.

The previous prime is 1222021012033. The next prime is 1222021012123. The reversal of 1222021012122 is 2212101202221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1222021012095 and 1222021012104.

It is not an unprimeable number, because it can be changed into a prime (1222021012123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337779 + ... + 1599417.

It is an arithmetic number, because the mean of its divisors is an integer number (57232406140).

Almost surely, 2^{1222021012122} is an apocalyptic number.

1222021012122 is an abundant number, since it is smaller than the sum of its proper divisors (1525134482598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222021012122 is a wasteful number, since it uses less digits than its factorization.

1222021012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263649 (or 1263637 counting only the distinct ones).

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

Adding to 1222021012122 its reverse (2212101202221), we get a palindrome (3434122214343).

The spelling of 1222021012122 in words is "one trillion, two hundred twenty-two billion, twenty-one million, twelve thousand, one hundred twenty-two".