21143040412 has 48 divisors (see below), whose sum is σ = 40136605600. Its totient is φ = 9745107840.

The previous prime is 21143040409. The next prime is 21143040431. The reversal of 21143040412 is 21404034112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 9920587 + ... + 9922717.

Almost surely, 2^21143040412 is an apocalyptic number.

It is an amenable number.

21143040412 is a deficient number, since it is larger than the sum of its proper divisors (18993565188).

21143040412 is a wasteful number, since it uses less digits than its factorization.

21143040412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303 (or 3275 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21143040412 its reverse (21404034112), we get a palindrome (42547074524).

The spelling of 21143040412 in words is "twenty-one billion, one hundred forty-three million, forty thousand, four hundred twelve".