20001202111 has 6 divisors (see below), whose sum is σ = 21984792536. Its totient is φ = 18182910900.

The previous prime is 20001202057. The next prime is 20001202127. The reversal of 20001202111 is 11120210002.

It is not a de Polignac number, because 20001202111 - 2¹⁷ = 20001071039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001202141) 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 in 5 ways as a sum of consecutive naturals, for example, 82649475 + ... + 82649716.

Almost surely, 2^20001202111 is an apocalyptic number.

20001202111 is a deficient number, since it is larger than the sum of its proper divisors (1983590425).

20001202111 is a wasteful number, since it uses less digits than its factorization.

20001202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165299213 (or 165299202 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20001202111 its reverse (11120210002), we get a palindrome (31121412113).

The spelling of 20001202111 in words is "twenty billion, one million, two hundred two thousand, one hundred eleven".