12213220211146 has 4 divisors (see below), whose sum is σ = 18319830316722. Its totient is φ = 6106610105572.

The previous prime is 12213220211119. The next prime is 12213220211147. The reversal of 12213220211146 is 64111202231221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7497525661921 + 4715694549225 = 2738161^2 + 2171565^2 .

It is not an unprimeable number, because it can be changed into a prime (12213220211147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3053305052785 + ... + 3053305052788.

Almost surely, 2^{12213220211146} is an apocalyptic number.

12213220211146 is a deficient number, since it is larger than the sum of its proper divisors (6106610105576).

12213220211146 is an equidigital number, since it uses as much as digits as its factorization.

12213220211146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106610105575.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 12213220211146 its reverse (64111202231221), we get a palindrome (76324422442367).

The spelling of 12213220211146 in words is "twelve trillion, two hundred thirteen billion, two hundred twenty million, two hundred eleven thousand, one hundred forty-six".