21124530012074 has 16 divisors (see below), whose sum is σ = 31888507226400. Its totient is φ = 10495234807344.

The previous prime is 21124530012073. The next prime is 21124530012133. The reversal of 21124530012074 is 47021003542112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21124530012074.

It is not an unprimeable number, because it can be changed into a prime (21124530012073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51596792 + ... + 52004595.

It is an arithmetic number, because the mean of its divisors is an integer number (1993031701650).

Almost surely, 2^{21124530012074} is an apocalyptic number.

21124530012074 is a deficient number, since it is larger than the sum of its proper divisors (10763977214326).

21124530012074 is a wasteful number, since it uses less digits than its factorization.

21124530012074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103602037.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 21124530012074 its reverse (47021003542112), we get a palindrome (68145533554186).

The spelling of 21124530012074 in words is "twenty-one trillion, one hundred twenty-four billion, five hundred thirty million, twelve thousand, seventy-four".