21122103223 has 8 divisors (see below), whose sum is σ = 23531256000. Its totient is φ = 18825004128.

The previous prime is 21122103139. The next prime is 21122103227. The reversal of 21122103223 is 32230122112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122103223 is a prime.

It is a super-2 number, since 2×21122103223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21122103223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122103227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28013023 + ... + 28013776.

It is an arithmetic number, because the mean of its divisors is an integer number (2941407000).

Almost surely, 2^21122103223 is an apocalyptic number.

21122103223 is a deficient number, since it is larger than the sum of its proper divisors (2409152777).

21122103223 is a wasteful number, since it uses less digits than its factorization.

21122103223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56026841.

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

Adding to 21122103223 its reverse (32230122112), we get a palindrome (53352225335).

The spelling of 21122103223 in words is "twenty-one billion, one hundred twenty-two million, one hundred three thousand, two hundred twenty-three".