23221012 has 6 divisors (see below), whose sum is σ = 40636778. Its totient is φ = 11610504.

The previous prime is 23220991. The next prime is 23221019. The reversal of 23221012 is 21012232.

It can be written as a sum of positive squares in only one way, i.e., 19236996 + 3984016 = 4386^2 + 1996^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23220983 and 23221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2902623 + ... + 2902630.

Almost surely, 2^23221012 is an apocalyptic number.

It is an amenable number.

23221012 is a deficient number, since it is larger than the sum of its proper divisors (17415766).

23221012 is a wasteful number, since it uses less digits than its factorization.

23221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5805257 (or 5805255 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23221012 is about 4818.8185273986. The cubic root of 23221012 is about 285.2947069489.

Adding to 23221012 its reverse (21012232), we get a palindrome (44233244).

It can be divided in two parts, 232 and 21012, that multiplied together give a palindrome (4874784).

The spelling of 23221012 in words is "twenty-three million, two hundred twenty-one thousand, twelve".