22011002122121 has 8 divisors (see below), whose sum is σ = 23305857751944. Its totient is φ = 20716156581120.

The previous prime is 22011002122099. The next prime is 22011002122201. The reversal of 22011002122121 is 12122120011022.

It can be written as a sum of positive squares in 4 ways, for example, as 3710265702025 + 18300736420096 = 1926205^2 + 4277936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22011002122121 - 2¹⁴ = 22011002105737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 22011002122121.

It is not an unprimeable number, because it can be changed into a prime (22011002122321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224871 + ... + 6998003.

It is an arithmetic number, because the mean of its divisors is an integer number (2913232218993).

Almost surely, 2^{22011002122121} is an apocalyptic number.

It is an amenable number.

22011002122121 is a deficient number, since it is larger than the sum of its proper divisors (1294855629823).

22011002122121 is a wasteful number, since it uses less digits than its factorization.

22011002122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044411.

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

Adding to 22011002122121 its reverse (12122120011022), we get a palindrome (34133122133143).

The spelling of 22011002122121 in words is "twenty-two trillion, eleven billion, two million, one hundred twenty-two thousand, one hundred twenty-one".