12210012321 has 32 divisors (see below), whose sum is σ = 18068252160. Its totient is φ = 7285572864.

The previous prime is 12210012319. The next prime is 12210012343. The reversal of 12210012321 is 12321001221.

It is not a de Polignac number, because 12210012321 - 2¹ = 12210012319 is a prime.

12210012321 is a modest number, since divided by 12321 gives 12210 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 12210012321.

It is not an unprimeable number, because it can be changed into a prime (12210010321) 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, 408360 + ... + 437238.

It is an arithmetic number, because the mean of its divisors is an integer number (564632880).

Almost surely, 2^12210012321 is an apocalyptic number.

It is an amenable number.

12210012321 is a deficient number, since it is larger than the sum of its proper divisors (5858239839).

12210012321 is a wasteful number, since it uses less digits than its factorization.

12210012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29225.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12210012321 its reverse (12321001221), we get a palindrome (24531013542).

It can be divided in two parts, 122100 and 12321, that added together give a triangular number (134421 = T₅₁₈).

The spelling of 12210012321 in words is "twelve billion, two hundred ten million, twelve thousand, three hundred twenty-one".