20201022011 has 4 divisors (see below), whose sum is σ = 20212056624. Its totient is φ = 20189987400.

The previous prime is 20201022007. The next prime is 20201022029. The reversal of 20201022011 is 11022010202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20201022011 - 2² = 20201022007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201021983 and 20201022001.

It is not an unprimeable number, because it can be changed into a prime (20201022071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5514560 + ... + 5518221.

It is an arithmetic number, because the mean of its divisors is an integer number (5053014156).

Almost surely, 2^20201022011 is an apocalyptic number.

20201022011 is a deficient number, since it is larger than the sum of its proper divisors (11034613).

20201022011 is a wasteful number, since it uses less digits than its factorization.

20201022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11034612.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20201022011 its reverse (11022010202), we get a palindrome (31223032213).

The spelling of 20201022011 in words is "twenty billion, two hundred one million, twenty-two thousand, eleven".