21041442412 has 48 divisors (see below), whose sum is σ = 37391155200. Its totient is φ = 10360082880.

The previous prime is 21041442407. The next prime is 21041442431. The reversal of 21041442412 is 21424414012.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 48819837 + ... + 48820267.

It is an arithmetic number, because the mean of its divisors is an integer number (778982400).

Almost surely, 2^21041442412 is an apocalyptic number.

It is an amenable number.

21041442412 is a deficient number, since it is larger than the sum of its proper divisors (16349712788).

21041442412 is a wasteful number, since it uses less digits than its factorization.

21041442412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21041442412 its reverse (21424414012), we get a palindrome (42465856424).

The spelling of 21041442412 in words is "twenty-one billion, forty-one million, four hundred forty-two thousand, four hundred twelve".