21415012067 has 2 divisors, whose sum is σ = 21415012068. Its totient is φ = 21415012066.

The previous prime is 21415012051. The next prime is 21415012127. The reversal of 21415012067 is 76021051412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21415012067 - 2⁴ = 21415012051 is a prime.

It is a super-3 number, since 3×21415012067³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (21415012667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707506033 + 10707506034.

It is an arithmetic number, because the mean of its divisors is an integer number (10707506034).

Almost surely, 2^21415012067 is an apocalyptic number.

21415012067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21415012067 is an equidigital number, since it uses as much as digits as its factorization.

21415012067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 21415012067 its reverse (76021051412), we get a palindrome (97436063479).

The spelling of 21415012067 in words is "twenty-one billion, four hundred fifteen million, twelve thousand, sixty-seven".