221020610115 has 8 divisors (see below), whose sum is σ = 353632976208. Its totient is φ = 117877658720.

The previous prime is 221020610101. The next prime is 221020610117. The reversal of 221020610115 is 511016020122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221020610115 - 2⁴ = 221020610099 is a prime.

It is a super-2 number, since 2×221020610115² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221020610091 and 221020610100.

It is not an unprimeable number, because it can be changed into a prime (221020610117) 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 7 ways as a sum of consecutive naturals, for example, 7367353656 + ... + 7367353685.

It is an arithmetic number, because the mean of its divisors is an integer number (44204122026).

Almost surely, 2^221020610115 is an apocalyptic number.

221020610115 is a deficient number, since it is larger than the sum of its proper divisors (132612366093).

221020610115 is a wasteful number, since it uses less digits than its factorization.

221020610115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14734707349.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 221020610115 its reverse (511016020122), we get a palindrome (732036630237).

The spelling of 221020610115 in words is "two hundred twenty-one billion, twenty million, six hundred ten thousand, one hundred fifteen".