2021221121122 has 16 divisors (see below), whose sum is σ = 3668771111040. Its totient is φ = 815282468928.

The previous prime is 2021221121107. The next prime is 2021221121123. The reversal of 2021221121122 is 2211211221202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021221121122.

It is not an unprimeable number, because it can be changed into a prime (2021221121123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4246262622 + ... + 4246263097.

It is an arithmetic number, because the mean of its divisors is an integer number (229298194440).

Almost surely, 2^{2021221121122} is an apocalyptic number.

2021221121122 is a deficient number, since it is larger than the sum of its proper divisors (1647549989918).

2021221121122 is a wasteful number, since it uses less digits than its factorization.

2021221121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492525745.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2021221121122 its reverse (2211211221202), we get a palindrome (4232432342324).

The spelling of 2021221121122 in words is "two trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".