10721223 has 6 divisors (see below), whose sum is σ = 15486224. Its totient is φ = 7147476.

The previous prime is 10721219. The next prime is 10721261. The reversal of 10721223 is 32212701.

It is not a de Polignac number, because 10721223 - 2² = 10721219 is a prime.

It is a super-2 number, since 2×10721223² = 229889245231458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10721196 and 10721205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 595615 + ... + 595632.

Almost surely, 2^10721223 is an apocalyptic number.

10721223 is a deficient number, since it is larger than the sum of its proper divisors (4765001).

10721223 is a wasteful number, since it uses less digits than its factorization.

10721223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191253 (or 1191250 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 10721223 is about 3274.3278699605. The cubic root of 10721223 is about 220.5031390794.

Adding to 10721223 its reverse (32212701), we get a palindrome (42933924).

The spelling of 10721223 in words is "ten million, seven hundred twenty-one thousand, two hundred twenty-three".