21321122030101 has 4 divisors (see below), whose sum is σ = 21328133253804. Its totient is φ = 21314110806400.

The previous prime is 21321122030083. The next prime is 21321122030147. The reversal of 21321122030101 is 10103022112312.

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 10644239027601 + 10676883002500 = 3262551^2 + 3267550^2 .

It is a cyclic number.

It is not a de Polignac number, because 21321122030101 - 2¹⁷ = 21321121899029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321122030171) 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, 3505607290 + ... + 3505613371.

It is an arithmetic number, because the mean of its divisors is an integer number (5332033313451).

Almost surely, 2^{21321122030101} is an apocalyptic number.

It is an amenable number.

21321122030101 is a deficient number, since it is larger than the sum of its proper divisors (7011223703).

21321122030101 is an equidigital number, since it uses as much as digits as its factorization.

21321122030101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011223702.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21321122030101 its reverse (10103022112312), we get a palindrome (31424144142413).

The spelling of 21321122030101 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-two million, thirty thousand, one hundred one".