12735153221 has 4 divisors (see below), whose sum is σ = 14554460832. Its totient is φ = 10915845612.

The previous prime is 12735153157. The next prime is 12735153239. The reversal of 12735153221 is 12235153721.

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 12735153221 - 2⁶ = 12735153157 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 (12735153281) 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, 909653795 + ... + 909653808.

It is an arithmetic number, because the mean of its divisors is an integer number (3638615208).

Almost surely, 2^12735153221 is an apocalyptic number.

It is an amenable number.

12735153221 is a deficient number, since it is larger than the sum of its proper divisors (1819307611).

12735153221 is an equidigital number, since it uses as much as digits as its factorization.

12735153221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819307610.

The product of its digits is 12600, while the sum is 32.

The spelling of 12735153221 in words is "twelve billion, seven hundred thirty-five million, one hundred fifty-three thousand, two hundred twenty-one".