20001022122111 has 8 divisors (see below), whose sum is σ = 26672227228080. Its totient is φ = 13331915882112.

The previous prime is 20001022122097. The next prime is 20001022122161. The reversal of 20001022122111 is 11122122010002.

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

It is not a de Polignac number, because 20001022122111 - 2²¹ = 20001020024959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001022122161) 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, 524694256 + ... + 524732373.

It is an arithmetic number, because the mean of its divisors is an integer number (3334028403510).

Almost surely, 2^{20001022122111} is an apocalyptic number.

20001022122111 is a deficient number, since it is larger than the sum of its proper divisors (6671205105969).

20001022122111 is a wasteful number, since it uses less digits than its factorization.

20001022122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049432985.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20001022122111 its reverse (11122122010002), we get a palindrome (31123144132113).

The spelling of 20001022122111 in words is "twenty trillion, one billion, twenty-two million, one hundred twenty-two thousand, one hundred eleven".