12633154221 has 4 divisors (see below), whose sum is σ = 16844205632. Its totient is φ = 8422102812.

The previous prime is 12633154201. The next prime is 12633154273. The reversal of 12633154221 is 12245133621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12633154221 - 2¹⁴ = 12633137837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12633154201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105525701 + ... + 2105525706.

It is an arithmetic number, because the mean of its divisors is an integer number (4211051408).

Almost surely, 2^12633154221 is an apocalyptic number.

It is an amenable number.

12633154221 is a deficient number, since it is larger than the sum of its proper divisors (4211051411).

12633154221 is an equidigital number, since it uses as much as digits as its factorization.

12633154221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211051410.

The product of its digits is 8640, while the sum is 30.

Adding to 12633154221 its reverse (12245133621), we get a palindrome (24878287842).

The spelling of 12633154221 in words is "twelve billion, six hundred thirty-three million, one hundred fifty-four thousand, two hundred twenty-one".