20220121021 has 8 divisors (see below), whose sum is σ = 20566293120. Its totient is φ = 19876204608.

The previous prime is 20220120989. The next prime is 20220121073. The reversal of 20220121021 is 12012102202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20220121021 - 2⁵ = 20220120989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220120992 and 20220121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220121091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545836 + ... + 581701.

It is an arithmetic number, because the mean of its divisors is an integer number (2570786640).

Almost surely, 2^20220121021 is an apocalyptic number.

It is an amenable number.

20220121021 is a deficient number, since it is larger than the sum of its proper divisors (346172099).

20220121021 is a wasteful number, since it uses less digits than its factorization.

20220121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127843.

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

Adding to 20220121021 its reverse (12012102202), we get a palindrome (32232223223).

The spelling of 20220121021 in words is "twenty billion, two hundred twenty million, one hundred twenty-one thousand, twenty-one".