126216833501 has 4 divisors (see below), whose sum is σ = 137691091104. Its totient is φ = 114742575900.

The previous prime is 126216833497. The next prime is 126216833513. The reversal of 126216833501 is 105338612621.

It is a happy number.

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 126216833501 - 2² = 126216833497 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 (126216833531) 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 3 ways as a sum of consecutive naturals, for example, 5737128785 + ... + 5737128806.

It is an arithmetic number, because the mean of its divisors is an integer number (34422772776).

Almost surely, 2^126216833501 is an apocalyptic number.

126216833501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126216833501 is a deficient number, since it is larger than the sum of its proper divisors (11474257603).

126216833501 is a wasteful number, since it uses less digits than its factorization.

126216833501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11474257602.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 126216833501 in words is "one hundred twenty-six billion, two hundred sixteen million, eight hundred thirty-three thousand, five hundred one".