1001202221165 has 16 divisors (see below), whose sum is σ = 1253780252928. Its totient is φ = 766075660416.

The previous prime is 1001202221141. The next prime is 1001202221177. The reversal of 1001202221165 is 5611222021001.

It is a cyclic number.

It is not a de Polignac number, because 1001202221165 - 2⁶ = 1001202221101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001202221165.

It is a congruent number.

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, 1110209 + ... + 1798601.

It is an arithmetic number, because the mean of its divisors is an integer number (78361265808).

Almost surely, 2^{1001202221165} is an apocalyptic number.

It is an amenable number.

1001202221165 is a deficient number, since it is larger than the sum of its proper divisors (252578031763).

1001202221165 is a wasteful number, since it uses less digits than its factorization.

1001202221165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701068.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1001202221165 its reverse (5611222021001), we get a palindrome (6612424242166).

The spelling of 1001202221165 in words is "one trillion, one billion, two hundred two million, two hundred twenty-one thousand, one hundred sixty-five".