21203302101 has 4 divisors (see below), whose sum is σ = 28271069472. Its totient is φ = 14135534732.

The previous prime is 21203302079. The next prime is 21203302129. The reversal of 21203302101 is 10120330212.

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 21203302101 - 2⁹ = 21203301589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203302171) 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, 3533883681 + ... + 3533883686.

It is an arithmetic number, because the mean of its divisors is an integer number (7067767368).

Almost surely, 2^21203302101 is an apocalyptic number.

It is an amenable number.

21203302101 is a deficient number, since it is larger than the sum of its proper divisors (7067767371).

21203302101 is an equidigital number, since it uses as much as digits as its factorization.

21203302101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067767370.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21203302101 its reverse (10120330212), we get a palindrome (31323632313).

The spelling of 21203302101 in words is "twenty-one billion, two hundred three million, three hundred two thousand, one hundred one".