20002111101 has 72 divisors (see below), whose sum is σ = 35036258400. Its totient is φ = 10950488640.

The previous prime is 20002111099. The next prime is 20002111117. The reversal of 20002111101 is 10111120002.

It is a happy number.

It is not a de Polignac number, because 20002111101 - 2¹ = 20002111099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002111001) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1669390 + ... + 1681328.

It is an arithmetic number, because the mean of its divisors is an integer number (486614700).

Almost surely, 2^20002111101 is an apocalyptic number.

20002111101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20002111101 is a deficient number, since it is larger than the sum of its proper divisors (15034147299).

20002111101 is a wasteful number, since it uses less digits than its factorization.

20002111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12119 (or 12109 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20002111101 its reverse (10111120002), we get a palindrome (30113231103).

The spelling of 20002111101 in words is "twenty billion, two million, one hundred eleven thousand, one hundred one".