20012122222001 has 32 divisors (see below), whose sum is σ = 25674126508800. Its totient is φ = 15171074231040.

The previous prime is 20012122221979. The next prime is 20012122222013. The reversal of 20012122222001 is 10022222121002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20012122222001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20012122227001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28597886 + ... + 29289303.

It is an arithmetic number, because the mean of its divisors is an integer number (802316453400).

Almost surely, 2^{20012122222001} is an apocalyptic number.

It is an amenable number.

20012122222001 is a deficient number, since it is larger than the sum of its proper divisors (5662004286799).

20012122222001 is a wasteful number, since it uses less digits than its factorization.

20012122222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57887369.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20012122222001 its reverse (10022222121002), we get a palindrome (30034344343003).

The spelling of 20012122222001 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, one".