21102119115 has 32 divisors (see below), whose sum is σ = 42094619136. Its totient is φ = 8769711360.

The previous prime is 21102119063. The next prime is 21102119161. The reversal of 21102119115 is 51191120112.

It is not a de Polignac number, because 21102119115 - 2⁷ = 21102118987 is a prime.

It is a super-2 number, since 2×21102119115² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9133962 + ... + 9136271.

It is an arithmetic number, because the mean of its divisors is an integer number (1315456848).

Almost surely, 2^21102119115 is an apocalyptic number.

21102119115 is a deficient number, since it is larger than the sum of its proper divisors (20992500021).

21102119115 is a wasteful number, since it uses less digits than its factorization.

21102119115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18270259.

The product of its (nonzero) digits is 180, while the sum is 24.

Adding to 21102119115 its reverse (51191120112), we get a palindrome (72293239227).

The spelling of 21102119115 in words is "twenty-one billion, one hundred two million, one hundred nineteen thousand, one hundred fifteen".