21320221121101 has 4 divisors (see below), whose sum is σ = 24365966995552. Its totient is φ = 18274475246652.

The previous prime is 21320221121083. The next prime is 21320221121119. The reversal of 21320221121101 is 10112112202312.

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 an interprime number because it is at equal distance from previous prime (21320221121083) and next prime (21320221121119).

It is a cyclic number.

It is not a de Polignac number, because 21320221121101 - 2¹⁵ = 21320221088333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320221121141) 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, 1522872937215 + ... + 1522872937228.

It is an arithmetic number, because the mean of its divisors is an integer number (6091491748888).

Almost surely, 2^{21320221121101} is an apocalyptic number.

It is an amenable number.

21320221121101 is a deficient number, since it is larger than the sum of its proper divisors (3045745874451).

21320221121101 is an equidigital number, since it uses as much as digits as its factorization.

21320221121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045745874450.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21320221121101 its reverse (10112112202312), we get a palindrome (31432333323413).

The spelling of 21320221121101 in words is "twenty-one trillion, three hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred one".