20002111211 has 8 divisors (see below), whose sum is σ = 20966480304. Its totient is φ = 19060433280.

The previous prime is 20002111127. The next prime is 20002111271. The reversal of 20002111211 is 11211120002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002111211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002111192 and 20002111201.

It is not an unprimeable number, because it can be changed into a prime (20002111271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5670986 + ... + 5674511.

It is an arithmetic number, because the mean of its divisors is an integer number (2620810038).

Almost surely, 2^20002111211 is an apocalyptic number.

20002111211 is a deficient number, since it is larger than the sum of its proper divisors (964369093).

20002111211 is a wasteful number, since it uses less digits than its factorization.

20002111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11345581.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20002111211 its reverse (11211120002), we get a palindrome (31213231213).

The spelling of 20002111211 in words is "twenty billion, two million, one hundred eleven thousand, two hundred eleven".