21214036536612 has 12 divisors (see below), whose sum is σ = 49499418585456. Its totient is φ = 7071345512200.

The previous prime is 21214036536607. The next prime is 21214036536617. The reversal of 21214036536612 is 21663563041212.

It is an interprime number because it is at equal distance from previous prime (21214036536607) and next prime (21214036536617).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21214036536617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883918189014 + ... + 883918189037.

It is an arithmetic number, because the mean of its divisors is an integer number (4124951548788).

Almost surely, 2^{21214036536612} is an apocalyptic number.

It is an amenable number.

21214036536612 is an abundant number, since it is smaller than the sum of its proper divisors (28285382048844).

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

21214036536612 is a wasteful number, since it uses less digits than its factorization.

21214036536612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767836378058 (or 1767836378056 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

Adding to 21214036536612 its reverse (21663563041212), we get a palindrome (42877599577824).

The spelling of 21214036536612 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, six hundred twelve".