2215221665107 has 24 divisors (see below), whose sum is σ = 2713835048400. Its totient is φ = 1795620119040.

The previous prime is 2215221665089. The next prime is 2215221665119. The reversal of 2215221665107 is 7015661225122.

It is a happy number.

It is not a de Polignac number, because 2215221665107 - 2⁷ = 2215221664979 is a prime.

It is a super-2 number, since 2×2215221665107² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2215221665107.

It is not an unprimeable number, because it can be changed into a prime (2215221695107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28300882 + ... + 28379047.

It is an arithmetic number, because the mean of its divisors is an integer number (113076460350).

Almost surely, 2^{2215221665107} is an apocalyptic number.

2215221665107 is a deficient number, since it is larger than the sum of its proper divisors (498613383293).

2215221665107 is a wasteful number, since it uses less digits than its factorization.

2215221665107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56679987 (or 56679976 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 2215221665107 in words is "two trillion, two hundred fifteen billion, two hundred twenty-one million, six hundred sixty-five thousand, one hundred seven".