22012001200121 has 4 divisors (see below), whose sum is σ = 22012030084452. Its totient is φ = 22011972315792.

The previous prime is 22012001200073. The next prime is 22012001200169. The reversal of 22012001200121 is 12100210021022.

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

It is an interprime number because it is at equal distance from previous prime (22012001200073) and next prime (22012001200169).

It can be written as a sum of positive squares in 2 ways, for example, as 5613866809600 + 16398134390521 = 2369360^2 + 4049461^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012001200121 - 2³⁸ = 21737123293177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012001200096 and 22012001200105.

It is not an unprimeable number, because it can be changed into a prime (22012001200181) 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, 13267190 + ... + 14833823.

It is an arithmetic number, because the mean of its divisors is an integer number (5503007521113).

Almost surely, 2^{22012001200121} is an apocalyptic number.

It is an amenable number.

22012001200121 is a deficient number, since it is larger than the sum of its proper divisors (28884331).

22012001200121 is an equidigital number, since it uses as much as digits as its factorization.

22012001200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28884330.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22012001200121 its reverse (12100210021022), we get a palindrome (34112211221143).

The spelling of 22012001200121 in words is "twenty-two trillion, twelve billion, one million, two hundred thousand, one hundred twenty-one".