21772317103 has 4 divisors (see below), whose sum is σ = 21910994440. Its totient is φ = 21633639768.

The previous prime is 21772317101. The next prime is 21772317121. The reversal of 21772317103 is 30171327712.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21772317103 - 2¹ = 21772317101 is a prime.

It is a super-3 number, since 3×21772317103³ (a number of 32 digits) contains 333 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 (21772317101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69338433 + ... + 69338746.

It is an arithmetic number, because the mean of its divisors is an integer number (5477748610).

Almost surely, 2^21772317103 is an apocalyptic number.

21772317103 is a deficient number, since it is larger than the sum of its proper divisors (138677337).

21772317103 is a wasteful number, since it uses less digits than its factorization.

21772317103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138677336.

The product of its (nonzero) digits is 12348, while the sum is 34.

The spelling of 21772317103 in words is "twenty-one billion, seven hundred seventy-two million, three hundred seventeen thousand, one hundred three".