21126067242 has 32 divisors (see below), whose sum is σ = 48298088832. Its totient is φ = 6034777344.

The previous prime is 21126067241. The next prime is 21126067289. The reversal of 21126067242 is 24276062112.

It is a super-2 number, since 2×21126067242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21126067241) 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 15 ways as a sum of consecutive naturals, for example, 165558 + ... + 263934.

It is an arithmetic number, because the mean of its divisors is an integer number (1509315276).

Almost surely, 2^21126067242 is an apocalyptic number.

21126067242 is an abundant number, since it is smaller than the sum of its proper divisors (27172021590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21126067242 is a wasteful number, since it uses less digits than its factorization.

21126067242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103502.

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 21126067242 in words is "twenty-one billion, one hundred twenty-six million, sixty-seven thousand, two hundred forty-two".