20112022021 has 24 divisors (see below), whose sum is σ = 25209752064. Its totient is φ = 15903669600.

The previous prime is 20112022013. The next prime is 20112022037. The reversal of 20112022021 is 12022021102.

It is a happy number.

It is not a de Polignac number, because 20112022021 - 2³ = 20112022013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20112021992 and 20112022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112022421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1234696 + ... + 1250878.

It is an arithmetic number, because the mean of its divisors is an integer number (1050406336).

Almost surely, 2^20112022021 is an apocalyptic number.

It is an amenable number.

20112022021 is a deficient number, since it is larger than the sum of its proper divisors (5097730043).

20112022021 is a wasteful number, since it uses less digits than its factorization.

20112022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18161 (or 18154 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20112022021 its reverse (12022021102), we get a palindrome (32134043123).

The spelling of 20112022021 in words is "twenty billion, one hundred twelve million, twenty-two thousand, twenty-one".