20032121111 has 2 divisors, whose sum is σ = 20032121112. Its totient is φ = 20032121110.

The previous prime is 20032121069. The next prime is 20032121159. The reversal of 20032121111 is 11112123002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20032121111 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20032121191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016060555 + 10016060556.

It is an arithmetic number, because the mean of its divisors is an integer number (10016060556).

Almost surely, 2^20032121111 is an apocalyptic number.

20032121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20032121111 is an equidigital number, since it uses as much as digits as its factorization.

20032121111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20032121111 its reverse (11112123002), we get a palindrome (31144244113).

The spelling of 20032121111 in words is "twenty billion, thirty-two million, one hundred twenty-one thousand, one hundred eleven".