20002021111 has 2 divisors, whose sum is σ = 20002021112. Its totient is φ = 20002021110.

The previous prime is 20002021079. The next prime is 20002021121. The reversal of 20002021111 is 11112020002.

It is an a-pointer prime, because the next prime (20002021121) can be obtained adding 20002021111 to its sum of digits (10).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20002021111 - 2⁵ = 20002021079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002021121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001010555 + 10001010556.

It is an arithmetic number, because the mean of its divisors is an integer number (10001010556).

Almost surely, 2^20002021111 is an apocalyptic number.

20002021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002021111 is an equidigital number, since it uses as much as digits as its factorization.

20002021111 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 10.

Adding to 20002021111 its reverse (11112020002), we get a palindrome (31114041113).

The spelling of 20002021111 in words is "twenty billion, two million, twenty-one thousand, one hundred eleven".