126321108251 has 12 divisors (see below), whose sum is σ = 136817409960. Its totient is φ = 116576965440.

The previous prime is 126321108233. The next prime is 126321108253. The reversal of 126321108251 is 152801123621.

It is not a de Polignac number, because 126321108251 - 2⁶ = 126321108187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126321108253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660356 + ... + 829886.

It is an arithmetic number, because the mean of its divisors is an integer number (11401450830).

Almost surely, 2^126321108251 is an apocalyptic number.

126321108251 is a deficient number, since it is larger than the sum of its proper divisors (10496301709).

126321108251 is a wasteful number, since it uses less digits than its factorization.

126321108251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173966 (or 173953 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 126321108251 in words is "one hundred twenty-six billion, three hundred twenty-one million, one hundred eight thousand, two hundred fifty-one".