126837721001 has 4 divisors (see below), whose sum is σ = 126946037904. Its totient is φ = 126729404100.

The previous prime is 126837720959. The next prime is 126837721057. The reversal of 126837721001 is 100127738621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126837721001 - 2¹⁰ = 126837719977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126837721301) 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 3 ways as a sum of consecutive naturals, for example, 54156695 + ... + 54159036.

It is an arithmetic number, because the mean of its divisors is an integer number (31736509476).

Almost surely, 2^126837721001 is an apocalyptic number.

It is an amenable number.

126837721001 is a deficient number, since it is larger than the sum of its proper divisors (108316903).

126837721001 is a wasteful number, since it uses less digits than its factorization.

126837721001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108316902.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 126837721001 in words is "one hundred twenty-six billion, eight hundred thirty-seven million, seven hundred twenty-one thousand, one".