20112003021 has 48 divisors (see below), whose sum is σ = 30508982784. Its totient is φ = 11763840000.

The previous prime is 20112003011. The next prime is 20112003049. The reversal of 20112003021 is 12030021102.

It is not a de Polignac number, because 20112003021 - 2¹⁴ = 20111986637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112002988 and 20112003006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112003011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4510225 + ... + 4514681.

It is an arithmetic number, because the mean of its divisors is an integer number (635603808).

Almost surely, 2^20112003021 is an apocalyptic number.

It is an amenable number.

20112003021 is a deficient number, since it is larger than the sum of its proper divisors (10396979763).

20112003021 is a wasteful number, since it uses less digits than its factorization.

20112003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914 (or 4903 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20112003021 its reverse (12030021102), we get a palindrome (32142024123).

The spelling of 20112003021 in words is "twenty billion, one hundred twelve million, three thousand, twenty-one".