10023212221 has 32 divisors (see below), whose sum is σ = 11249539200. Its totient is φ = 8854318080.

The previous prime is 10023212201. The next prime is 10023212281. The reversal of 10023212221 is 12221232001.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10023212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10023212195 and 10023212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10023212201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19691715 + ... + 19692223.

It is an arithmetic number, because the mean of its divisors is an integer number (351548100).

Almost surely, 2^10023212221 is an apocalyptic number.

10023212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10023212221 is a deficient number, since it is larger than the sum of its proper divisors (1226326979).

10023212221 is a wasteful number, since it uses less digits than its factorization.

10023212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 10023212221 its reverse (12221232001), we get a palindrome (22244444222).

The spelling of 10023212221 in words is "ten billion, twenty-three million, two hundred twelve thousand, two hundred twenty-one".