20001011002111 has 2 divisors, whose sum is σ = 20001011002112. Its totient is φ = 20001011002110.

The previous prime is 20001011002087. The next prime is 20001011002139. The reversal of 20001011002111 is 11120011010002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001011002111 - 2⁹ = 20001011001599 is a prime.

It is a super-2 number, since 2×20001011002111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001011002811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000505501055 + 10000505501056.

It is an arithmetic number, because the mean of its divisors is an integer number (10000505501056).

Almost surely, 2^{20001011002111} is an apocalyptic number.

20001011002111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001011002111 is an equidigital number, since it uses as much as digits as its factorization.

20001011002111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20001011002111 its reverse (11120011010002), we get a palindrome (31121022012113).

The spelling of 20001011002111 in words is "twenty trillion, one billion, eleven million, two thousand, one hundred eleven".