21323222101 has 4 divisors (see below), whose sum is σ = 21323782912. Its totient is φ = 21322661292.

The previous prime is 21323222069. The next prime is 21323222143. The reversal of 21323222101 is 10122232312.

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 21323222101 - 2⁵ = 21323222069 is a prime.

It is a super-4 number, since 4×21323222101⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323222161) 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, 218871 + ... + 300916.

It is an arithmetic number, because the mean of its divisors is an integer number (5330945728).

Almost surely, 2^21323222101 is an apocalyptic number.

It is an amenable number.

21323222101 is a deficient number, since it is larger than the sum of its proper divisors (560811).

21323222101 is an equidigital number, since it uses as much as digits as its factorization.

21323222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560810.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21323222101 its reverse (10122232312), we get a palindrome (31445454413).

The spelling of 21323222101 in words is "twenty-one billion, three hundred twenty-three million, two hundred twenty-two thousand, one hundred one".