20112021021 has 8 divisors (see below), whose sum is σ = 27081533664. Its totient is φ = 13275261200.

The previous prime is 20112020993. The next prime is 20112021029. The reversal of 20112021021 is 12012021102.

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-20112021021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112020988 and 20112021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112021029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33187851 + ... + 33188456.

It is an arithmetic number, because the mean of its divisors is an integer number (3385191708).

Almost surely, 2^20112021021 is an apocalyptic number.

It is an amenable number.

20112021021 is a deficient number, since it is larger than the sum of its proper divisors (6969512643).

20112021021 is a wasteful number, since it uses less digits than its factorization.

20112021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66376411.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20112021021 its reverse (12012021102), we get a palindrome (32124042123).

The spelling of 20112021021 in words is "twenty billion, one hundred twelve million, twenty-one thousand, twenty-one".