20110002021 has 12 divisors (see below), whose sum is σ = 30576611520. Its totient is φ = 12701053800.

The previous prime is 20110002013. The next prime is 20110002037. The reversal of 20110002021 is 12020001102.

It is not a de Polignac number, because 20110002021 - 2³ = 20110002013 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20110001994 and 20110002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110002061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58801005 + ... + 58801346.

It is an arithmetic number, because the mean of its divisors is an integer number (2548050960).

Almost surely, 2^20110002021 is an apocalyptic number.

It is an amenable number.

20110002021 is a deficient number, since it is larger than the sum of its proper divisors (10466609499).

20110002021 is a wasteful number, since it uses less digits than its factorization.

20110002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117602376 (or 117602373 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20110002021 its reverse (12020001102), we get a palindrome (32130003123).

It can be divided in two parts, 2011000 and 2021, that added together give a triangular number (2013021 = T₂₀₀₆).

The spelling of 20110002021 in words is "twenty billion, one hundred ten million, two thousand, twenty-one".