11202161221 has 8 divisors (see below), whose sum is σ = 11303195904. Its totient is φ = 11101543920.

The previous prime is 11202161213. The next prime is 11202161233. The reversal of 11202161221 is 12216120211.

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

It is a cyclic number.

It is not a de Polignac number, because 11202161221 - 2³ = 11202161213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202161251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50301 + ... + 157906.

It is an arithmetic number, because the mean of its divisors is an integer number (1412899488).

Almost surely, 2^11202161221 is an apocalyptic number.

It is an amenable number.

11202161221 is a deficient number, since it is larger than the sum of its proper divisors (101034683).

11202161221 is a wasteful number, since it uses less digits than its factorization.

11202161221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208691.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11202161221 its reverse (12216120211), we get a palindrome (23418281432).

The spelling of 11202161221 in words is "eleven billion, two hundred two million, one hundred sixty-one thousand, two hundred twenty-one".