1247321226851 has 8 divisors (see below), whose sum is σ = 1425552526944. Its totient is φ = 1069100565120.

The previous prime is 1247321226839. The next prime is 1247321226857. The reversal of 1247321226851 is 1586221237421.

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

It is not a de Polignac number, because 1247321226851 - 2⁶ = 1247321226787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1247321226857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2406740 + ... + 2878721.

It is an arithmetic number, because the mean of its divisors is an integer number (178194065868).

Almost surely, 2^{1247321226851} is an apocalyptic number.

1247321226851 is a deficient number, since it is larger than the sum of its proper divisors (178231300093).

1247321226851 is an equidigital number, since it uses as much as digits as its factorization.

1247321226851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319181.

The product of its digits is 322560, while the sum is 44.

The spelling of 1247321226851 in words is "one trillion, two hundred forty-seven billion, three hundred twenty-one million, two hundred twenty-six thousand, eight hundred fifty-one".