12621270156 has 48 divisors (see below), whose sum is σ = 32319302400. Its totient is φ = 3801718720.

The previous prime is 12621270113. The next prime is 12621270191. The reversal of 12621270156 is 65107212621.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264231 + ... + 308318.

It is an arithmetic number, because the mean of its divisors is an integer number (673318800).

Almost surely, 2^12621270156 is an apocalyptic number.

It is an amenable number.

12621270156 is an abundant number, since it is smaller than the sum of its proper divisors (19698032244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12621270156 is a wasteful number, since it uses less digits than its factorization.

12621270156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572734 (or 572732 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

Adding to 12621270156 its reverse (65107212621), we get a palindrome (77728482777).

The spelling of 12621270156 in words is "twelve billion, six hundred twenty-one million, two hundred seventy thousand, one hundred fifty-six".