221211002115 has 48 divisors (see below), whose sum is σ = 390940149600. Its totient is φ = 115691452416.

The previous prime is 221211002071. The next prime is 221211002141. The reversal of 221211002115 is 511200112122.

It is not a de Polignac number, because 221211002115 - 2⁷ = 221211001987 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 243316 + ... + 708254.

It is an arithmetic number, because the mean of its divisors is an integer number (8144586450).

Almost surely, 2^221211002115 is an apocalyptic number.

221211002115 is a deficient number, since it is larger than the sum of its proper divisors (169729147485).

221211002115 is a wasteful number, since it uses less digits than its factorization.

221211002115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465156 (or 465153 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 221211002115 its reverse (511200112122), we get a palindrome (732411114237).

The spelling of 221211002115 in words is "two hundred twenty-one billion, two hundred eleven million, two thousand, one hundred fifteen".