21210036412 has 12 divisors (see below), whose sum is σ = 37626024016. Its totient is φ = 10459743840.

The previous prime is 21210036409. The next prime is 21210036427. The reversal of 21210036412 is 21463001212.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 36318264 + ... + 36318847.

Almost surely, 2^21210036412 is an apocalyptic number.

It is an amenable number.

21210036412 is a deficient number, since it is larger than the sum of its proper divisors (16415987604).

21210036412 is a wasteful number, since it uses less digits than its factorization.

21210036412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72637188 (or 72637186 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21210036412 its reverse (21463001212), we get a palindrome (42673037624).

The spelling of 21210036412 in words is "twenty-one billion, two hundred ten million, thirty-six thousand, four hundred twelve".