21320122101 has 4 divisors (see below), whose sum is σ = 28426829472. Its totient is φ = 14213414732.

The previous prime is 21320122097. The next prime is 21320122123. The reversal of 21320122101 is 10122102312.

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 21320122101 - 2² = 21320122097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320122151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3553353681 + ... + 3553353686.

It is an arithmetic number, because the mean of its divisors is an integer number (7106707368).

Almost surely, 2^21320122101 is an apocalyptic number.

It is an amenable number.

21320122101 is a deficient number, since it is larger than the sum of its proper divisors (7106707371).

21320122101 is an equidigital number, since it uses as much as digits as its factorization.

21320122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106707370.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21320122101 its reverse (10122102312), we get a palindrome (31442224413).

The spelling of 21320122101 in words is "twenty-one billion, three hundred twenty million, one hundred twenty-two thousand, one hundred one".