21223355101 has 8 divisors (see below), whose sum is σ = 24200387064. Its totient is φ = 18438389760.

The previous prime is 21223355089. The next prime is 21223355123. The reversal of 21223355101 is 10155332212.

It can be written as a sum of positive squares in 4 ways, for example, as 2945667076 + 18277688025 = 54274^2 + 135195^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21223355101 - 2¹⁹ = 21222830813 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 (21223355161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48016420 + ... + 48016861.

It is an arithmetic number, because the mean of its divisors is an integer number (3025048383).

Almost surely, 2^21223355101 is an apocalyptic number.

It is an amenable number.

21223355101 is a deficient number, since it is larger than the sum of its proper divisors (2977031963).

21223355101 is a wasteful number, since it uses less digits than its factorization.

21223355101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96033311.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21223355101 its reverse (10155332212), we get a palindrome (31378687313).

The spelling of 21223355101 in words is "twenty-one billion, two hundred twenty-three million, three hundred fifty-five thousand, one hundred one".