20101033232221 has 4 divisors (see below), whose sum is σ = 20101295269692. Its totient is φ = 20100771194752.

The previous prime is 20101033232213. The next prime is 20101033232227. The reversal of 20101033232221 is 12223233010102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20046797343225 + 54235888996 = 4477365^2 + 232886^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101033232221 - 2³ = 20101033232213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101033232192 and 20101033232201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101033232227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130903636 + ... + 131057101.

It is an arithmetic number, because the mean of its divisors is an integer number (5025323817423).

Almost surely, 2^{20101033232221} is an apocalyptic number.

It is an amenable number.

20101033232221 is a deficient number, since it is larger than the sum of its proper divisors (262037471).

20101033232221 is an equidigital number, since it uses as much as digits as its factorization.

20101033232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262037470.

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

Adding to 20101033232221 its reverse (12223233010102), we get a palindrome (32324266242323).

The spelling of 20101033232221 in words is "twenty trillion, one hundred one billion, thirty-three million, two hundred thirty-two thousand, two hundred twenty-one".