20001002120111 has 2 divisors, whose sum is σ = 20001002120112. Its totient is φ = 20001002120110.

The previous prime is 20001002120081. The next prime is 20001002120137. The reversal of 20001002120111 is 11102120010002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001002120111 - 2²² = 20000997925807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001002120092 and 20001002120101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001002126111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000501060055 + 10000501060056.

It is an arithmetic number, because the mean of its divisors is an integer number (10000501060056).

Almost surely, 2^{20001002120111} is an apocalyptic number.

20001002120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001002120111 is an equidigital number, since it uses as much as digits as its factorization.

20001002120111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001002120111 its reverse (11102120010002), we get a palindrome (31103122130113).

The spelling of 20001002120111 in words is "twenty trillion, one billion, two million, one hundred twenty thousand, one hundred eleven".