20220112021 has 4 divisors (see below), whose sum is σ = 20344161952. Its totient is φ = 20096062092.

The previous prime is 20220111979. The next prime is 20220112027. The reversal of 20220112021 is 12021102202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12021102202 = 2 ⋅6010551101.

It is a cyclic number.

It is not a de Polignac number, because 20220112021 - 2¹⁹ = 20219587733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220111992 and 20220112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220112027) 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, 62024721 + ... + 62025046.

It is an arithmetic number, because the mean of its divisors is an integer number (5086040488).

Almost surely, 2^20220112021 is an apocalyptic number.

It is an amenable number.

20220112021 is a deficient number, since it is larger than the sum of its proper divisors (124049931).

20220112021 is a wasteful number, since it uses less digits than its factorization.

20220112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124049930.

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

Adding to 20220112021 its reverse (12021102202), we get a palindrome (32241214223).

The spelling of 20220112021 in words is "twenty billion, two hundred twenty million, one hundred twelve thousand, twenty-one".