126999421827 has 8 divisors (see below), whose sum is σ = 169503436800. Its totient is φ = 84580844040.

The previous prime is 126999421819. The next prime is 126999421831. The reversal of 126999421827 is 728124999621.

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

It is not a de Polignac number, because 126999421827 - 2³ = 126999421819 is a prime.

It is a super-2 number, since 2×126999421827² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126999421127) 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, 21355827 + ... + 21361772.

It is an arithmetic number, because the mean of its divisors is an integer number (21187929600).

Almost surely, 2^126999421827 is an apocalyptic number.

126999421827 is a deficient number, since it is larger than the sum of its proper divisors (42504014973).

126999421827 is an equidigital number, since it uses as much as digits as its factorization.

126999421827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42718593.

The product of its digits is 7838208, while the sum is 60.

The spelling of 126999421827 in words is "one hundred twenty-six billion, nine hundred ninety-nine million, four hundred twenty-one thousand, eight hundred twenty-seven".