20220131221 has 8 divisors (see below), whose sum is σ = 21107060024. Its totient is φ = 19351120320.

The previous prime is 20220131213. The next prime is 20220131231. The reversal of 20220131221 is 12213102202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3556996 + 20216574225 = 1886^2 + 142185^2 .

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 20220131221 - 2³ = 20220131213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220131195 and 20220131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220131231) 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, 4477170 + ... + 4481683.

It is an arithmetic number, because the mean of its divisors is an integer number (2638382503).

Almost surely, 2^20220131221 is an apocalyptic number.

It is an amenable number.

20220131221 is a deficient number, since it is larger than the sum of its proper divisors (886928803).

20220131221 is an equidigital number, since it uses as much as digits as its factorization.

20220131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8958951.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20220131221 its reverse (12213102202), we get a palindrome (32433233423).

The spelling of 20220131221 in words is "twenty billion, two hundred twenty million, one hundred thirty-one thousand, two hundred twenty-one".