20202220031321 has 8 divisors (see below), whose sum is σ = 20225112150600. Its totient is φ = 20179330378240.

The previous prime is 20202220031299. The next prime is 20202220031327. The reversal of 20202220031321 is 12313002220202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22458019600 + 20179762011721 = 149860^2 + 4492189^2 .

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 20202220031321 - 2³⁴ = 20185040162137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202220031293 and 20202220031302.

It is not an unprimeable number, because it can be changed into a prime (20202220031327) 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, 16030331 + ... + 17244591.

It is an arithmetic number, because the mean of its divisors is an integer number (2528139018825).

Almost surely, 2^{20202220031321} is an apocalyptic number.

It is an amenable number.

20202220031321 is a deficient number, since it is larger than the sum of its proper divisors (22892119279).

20202220031321 is a wasteful number, since it uses less digits than its factorization.

20202220031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233099.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20202220031321 its reverse (12313002220202), we get a palindrome (32515222251523).

The spelling of 20202220031321 in words is "twenty trillion, two hundred two billion, two hundred twenty million, thirty-one thousand, three hundred twenty-one".