215502122101 has 16 divisors (see below), whose sum is σ = 248592023680. Its totient is φ = 182988797760.

The previous prime is 215502122093. The next prime is 215502122113. The reversal of 215502122101 is 101221205512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 215502122101 - 2³ = 215502122093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215502122131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4877230 + ... + 4921216.

It is an arithmetic number, because the mean of its divisors is an integer number (15537001480).

Almost surely, 2^215502122101 is an apocalyptic number.

It is an amenable number.

215502122101 is a deficient number, since it is larger than the sum of its proper divisors (33089901579).

215502122101 is a wasteful number, since it uses less digits than its factorization.

215502122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50524.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 215502122101 its reverse (101221205512), we get a palindrome (316723327613).

The spelling of 215502122101 in words is "two hundred fifteen billion, five hundred two million, one hundred twenty-two thousand, one hundred one".