20221022021 has 8 divisors (see below), whose sum is σ = 20302082904. Its totient is φ = 20140070400.

The previous prime is 20221021999. The next prime is 20221022027. The reversal of 20221022021 is 12022012202.

It can be written as a sum of positive squares in 4 ways, for example, as 1256702500 + 18964319521 = 35450^2 + 137711^2 .

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 20221022021 - 2³⁴ = 3041152837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20221021987 and 20221022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221022027) 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, 354161 + ... + 407273.

It is an arithmetic number, because the mean of its divisors is an integer number (2537760363).

Almost surely, 2^20221022021 is an apocalyptic number.

It is an amenable number.

20221022021 is a deficient number, since it is larger than the sum of its proper divisors (81060883).

20221022021 is a wasteful number, since it uses less digits than its factorization.

20221022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54631.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20221022021 its reverse (12022012202), we get a palindrome (32243034223).

The spelling of 20221022021 in words is "twenty billion, two hundred twenty-one million, twenty-two thousand, twenty-one".