20011253111 has 2 divisors, whose sum is σ = 20011253112. Its totient is φ = 20011253110.

The previous prime is 20011253081. The next prime is 20011253159. The reversal of 20011253111 is 11135211002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011253111 - 2²⁶ = 19944144247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011253111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011253411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005626555 + 10005626556.

It is an arithmetic number, because the mean of its divisors is an integer number (10005626556).

Almost surely, 2^20011253111 is an apocalyptic number.

20011253111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011253111 is an equidigital number, since it uses as much as digits as its factorization.

20011253111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 20011253111 its reverse (11135211002), we get a palindrome (31146464113).

The spelling of 20011253111 in words is "twenty billion, eleven million, two hundred fifty-three thousand, one hundred eleven".