12920181226 has 8 divisors (see below), whose sum is σ = 19407228480. Its totient is φ = 6451105068.

The previous prime is 12920181223. The next prime is 12920181227. The reversal of 12920181226 is 62218102921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12920181191 and 12920181200.

It is not an unprimeable number, because it can be changed into a prime (12920181221) 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, 4490976 + ... + 4493851.

It is an arithmetic number, because the mean of its divisors is an integer number (2425903560).

Almost surely, 2^12920181226 is an apocalyptic number.

12920181226 is a deficient number, since it is larger than the sum of its proper divisors (6487047254).

12920181226 is an equidigital number, since it uses as much as digits as its factorization.

12920181226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8985548.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 12920181226 in words is "twelve billion, nine hundred twenty million, one hundred eighty-one thousand, two hundred twenty-six".