22021120120121 has 4 divisors (see below), whose sum is σ = 22148409831972. Its totient is φ = 21893830408272.

The previous prime is 22021120120007. The next prime is 22021120120133. The reversal of 22021120120121 is 12102102112022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15257812515625 + 6763307604496 = 3906125^2 + 2600636^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021120120121 - 2¹⁴ = 22021120103737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22021120120121.

It is not an unprimeable number, because it can be changed into a prime (22021120122121) 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 3 ways as a sum of consecutive naturals, for example, 63644855666 + ... + 63644856011.

It is an arithmetic number, because the mean of its divisors is an integer number (5537102457993).

Almost surely, 2^{22021120120121} is an apocalyptic number.

It is an amenable number.

22021120120121 is a deficient number, since it is larger than the sum of its proper divisors (127289711851).

22021120120121 is a wasteful number, since it uses less digits than its factorization.

22021120120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127289711850.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22021120120121 its reverse (12102102112022), we get a palindrome (34123222232143).

The spelling of 22021120120121 in words is "twenty-two trillion, twenty-one billion, one hundred twenty million, one hundred twenty thousand, one hundred twenty-one".