21212051160115 has 16 divisors (see below), whose sum is σ = 25774154683200. Its totient is φ = 16757291335680.

The previous prime is 21212051160077. The next prime is 21212051160161. The reversal of 21212051160115 is 51106115021212.

It is not a de Polignac number, because 21212051160115 - 2¹⁹ = 21212050635827 is a prime.

It is a super-2 number, since 2×21212051160115² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48486231 + ... + 48921760.

It is an arithmetic number, because the mean of its divisors is an integer number (1610884667700).

Almost surely, 2^{21212051160115} is an apocalyptic number.

21212051160115 is a deficient number, since it is larger than the sum of its proper divisors (4562103523085).

21212051160115 is an equidigital number, since it uses as much as digits as its factorization.

21212051160115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97408542.

The product of its (nonzero) digits is 1200, while the sum is 28.

Adding to 21212051160115 its reverse (51106115021212), we get a palindrome (72318166181327).

The spelling of 21212051160115 in words is "twenty-one trillion, two hundred twelve billion, fifty-one million, one hundred sixty thousand, one hundred fifteen".