1321126051 has 8 divisors (see below), whose sum is σ = 1510101344. Its totient is φ = 1132211520.

The previous prime is 1321126021. The next prime is 1321126061. The reversal of 1321126051 is 1506211231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1321126051 - 2⁵ = 1321126019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321126021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50161 + ... + 71821.

It is an arithmetic number, because the mean of its divisors is an integer number (188762668).

Almost surely, 2^1321126051 is an apocalyptic number.

1321126051 is a deficient number, since it is larger than the sum of its proper divisors (188975293).

1321126051 is an equidigital number, since it uses as much as digits as its factorization.

1321126051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30381.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1321126051 is about 36347.2977124848. The cubic root of 1321126051 is about 1097.2731497038.

Adding to 1321126051 its reverse (1506211231), we get a palindrome (2827337282).

The spelling of 1321126051 in words is "one billion, three hundred twenty-one million, one hundred twenty-six thousand, fifty-one".