20211088811 has 2 divisors, whose sum is σ = 20211088812. Its totient is φ = 20211088810.

The previous prime is 20211088763. The next prime is 20211088831. The reversal of 20211088811 is 11888011202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211088811 is a prime.

It is a super-2 number, since 2×20211088811² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20211088831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105544405 + 10105544406.

It is an arithmetic number, because the mean of its divisors is an integer number (10105544406).

Almost surely, 2^20211088811 is an apocalyptic number.

20211088811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211088811 is an equidigital number, since it uses as much as digits as its factorization.

20211088811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 32.

The spelling of 20211088811 in words is "twenty billion, two hundred eleven million, eighty-eight thousand, eight hundred eleven".