21215452564119 has 16 divisors (see below), whose sum is σ = 30859345782144. Its totient is φ = 12857639335200.

The previous prime is 21215452564093. The next prime is 21215452564157. The reversal of 21215452564119 is 91146525451212.

It is not a de Polignac number, because 21215452564119 - 2³² = 21211157596823 is a prime.

It is a super-2 number, since 2×21215452564119² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21215452563119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3211329 + ... + 7262474.

It is an arithmetic number, because the mean of its divisors is an integer number (1928709111384).

Almost surely, 2^{21215452564119} is an apocalyptic number.

21215452564119 is a deficient number, since it is larger than the sum of its proper divisors (9643893218025).

21215452564119 is a wasteful number, since it uses less digits than its factorization.

21215452564119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10535198.

The product of its digits is 864000, while the sum is 48.

The spelling of 21215452564119 in words is "twenty-one trillion, two hundred fifteen billion, four hundred fifty-two million, five hundred sixty-four thousand, one hundred nineteen".