22011020122121 has 4 divisors (see below), whose sum is σ = 22605912557892. Its totient is φ = 21416127686352.

The previous prime is 22011020122081. The next prime is 22011020122127. The reversal of 22011020122121 is 12122102011022.

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 9738862111225 + 12272158010896 = 3120715^2 + 3503164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22011020122121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22011020122121.

It is not an unprimeable number, because it can be changed into a prime (22011020122127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297446217830 + ... + 297446217903.

It is an arithmetic number, because the mean of its divisors is an integer number (5651478139473).

Almost surely, 2^{22011020122121} is an apocalyptic number.

It is an amenable number.

22011020122121 is a deficient number, since it is larger than the sum of its proper divisors (594892435771).

22011020122121 is an equidigital number, since it uses as much as digits as its factorization.

22011020122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594892435770.

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

Adding to 22011020122121 its reverse (12122102011022), we get a palindrome (34133122133143).

The spelling of 22011020122121 in words is "twenty-two trillion, eleven billion, twenty million, one hundred twenty-two thousand, one hundred twenty-one".