20021105311 has 2 divisors, whose sum is σ = 20021105312. Its totient is φ = 20021105310.

The previous prime is 20021105263. The next prime is 20021105323. The reversal of 20021105311 is 11350112002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021105311 - 2⁷ = 20021105183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021115311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010552655 + 10010552656.

It is an arithmetic number, because the mean of its divisors is an integer number (10010552656).

Almost surely, 2^20021105311 is an apocalyptic number.

20021105311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021105311 is an equidigital number, since it uses as much as digits as its factorization.

20021105311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 20021105311 its reverse (11350112002), we get a palindrome (31371217313).

The spelling of 20021105311 in words is "twenty billion, twenty-one million, one hundred five thousand, three hundred eleven".