20331223010221 has 4 divisors (see below), whose sum is σ = 21401287379200. Its totient is φ = 19261158641244.

The previous prime is 20331223010213. The next prime is 20331223010227. The reversal of 20331223010221 is 12201032213302.

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.

It is a cyclic number.

It is not a de Polignac number, because 20331223010221 - 2³ = 20331223010213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331223010192 and 20331223010201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331223010227) 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, 535032184461 + ... + 535032184498.

It is an arithmetic number, because the mean of its divisors is an integer number (5350321844800).

Almost surely, 2^{20331223010221} is an apocalyptic number.

It is an amenable number.

20331223010221 is a deficient number, since it is larger than the sum of its proper divisors (1070064368979).

20331223010221 is a wasteful number, since it uses less digits than its factorization.

20331223010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070064368978.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20331223010221 its reverse (12201032213302), we get a palindrome (32532255223523).

The spelling of 20331223010221 in words is "twenty trillion, three hundred thirty-one billion, two hundred twenty-three million, ten thousand, two hundred twenty-one".