126533335621 has 16 divisors (see below), whose sum is σ = 157767689088. Its totient is φ = 98590003200.

The previous prime is 126533335589. The next prime is 126533335633.

126533335621 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 126533335621 - 2⁵ = 126533335589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126533335121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1115781 + ... + 1223941.

It is an arithmetic number, because the mean of its divisors is an integer number (9860480568).

Almost surely, 2^126533335621 is an apocalyptic number.

126533335621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126533335621 is a deficient number, since it is larger than the sum of its proper divisors (31234353467).

126533335621 is a wasteful number, since it uses less digits than its factorization.

126533335621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123372.

The product of its digits is 291600, while the sum is 40.

The spelling of 126533335621 in words is "one hundred twenty-six billion, five hundred thirty-three million, three hundred thirty-five thousand, six hundred twenty-one".