20812001101 has 16 divisors (see below), whose sum is σ = 22168209600. Its totient is φ = 19482173568.

The previous prime is 20812001071. The next prime is 20812001107. The reversal of 20812001101 is 10110021802.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20812001101 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 (20812001107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3373846 + ... + 3380008.

It is an arithmetic number, because the mean of its divisors is an integer number (1385513100).

Almost surely, 2^20812001101 is an apocalyptic number.

It is an amenable number.

20812001101 is a deficient number, since it is larger than the sum of its proper divisors (1356208499).

20812001101 is a wasteful number, since it uses less digits than its factorization.

20812001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8268.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20812001101 its reverse (10110021802), we get a palindrome (30922022903).

The spelling of 20812001101 in words is "twenty billion, eight hundred twelve million, one thousand, one hundred one".