1232210021 has 16 divisors (see below), whose sum is σ = 1516838400. Its totient is φ = 977317488.

The previous prime is 1232210003. The next prime is 1232210051. The reversal of 1232210021 is 1200122321.

It is a happy number.

It is not a de Polignac number, because 1232210021 - 2³⁰ = 158468197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1232209978 and 1232210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232210051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102011 + ... + 113448.

It is an arithmetic number, because the mean of its divisors is an integer number (94802400).

Almost surely, 2^1232210021 is an apocalyptic number.

It is an amenable number.

1232210021 is a deficient number, since it is larger than the sum of its proper divisors (284628379).

1232210021 is a wasteful number, since it uses less digits than its factorization.

1232210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215528.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1232210021 is about 35102.8491863552. The cubic root of 1232210021 is about 1072.0825951458.

Adding to 1232210021 its reverse (1200122321), we get a palindrome (2432332342).

The spelling of 1232210021 in words is "one billion, two hundred thirty-two million, two hundred ten thousand, twenty-one".