20001111122122 has 8 divisors (see below), whose sum is σ = 32309487197316. Its totient is φ = 9231282056352.

The previous prime is 20001111122077. The next prime is 20001111122123. The reversal of 20001111122122 is 22122111110002.

It can be written as a sum of positive squares in 2 ways, for example, as 18246575103201 + 1754536018921 = 4271601^2 + 1324589^2 .

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

It is a super-2 number, since 2×20001111122122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001111122096 and 20001111122105.

It is not an unprimeable number, because it can be changed into a prime (20001111122123) 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, 384636752323 + ... + 384636752374.

Almost surely, 2^{20001111122122} is an apocalyptic number.

20001111122122 is a deficient number, since it is larger than the sum of its proper divisors (12308376075194).

20001111122122 is a wasteful number, since it uses less digits than its factorization.

20001111122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769273504712.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20001111122122 its reverse (22122111110002), we get a palindrome (42123222232124).

The spelling of 20001111122122 in words is "twenty trillion, one billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-two".