21214616543115 has 16 divisors (see below), whose sum is σ = 33943986678816. Its totient is φ = 11314262086400.

The previous prime is 21214616543083. The next prime is 21214616543117. The reversal of 21214616543115 is 51134561641212.

It is a happy number.

It is not a de Polignac number, because 21214616543115 - 2⁵ = 21214616543083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21214616543117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11625816 + ... + 13326245.

It is an arithmetic number, because the mean of its divisors is an integer number (2121499167426).

Almost surely, 2^{21214616543115} is an apocalyptic number.

21214616543115 is a deficient number, since it is larger than the sum of its proper divisors (12729370135701).

21214616543115 is a wasteful number, since it uses less digits than its factorization.

21214616543115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25008750.

The product of its digits is 172800, while the sum is 42.

The spelling of 21214616543115 in words is "twenty-one trillion, two hundred fourteen billion, six hundred sixteen million, five hundred forty-three thousand, one hundred fifteen".