111122101202221 has 8 divisors (see below), whose sum is σ = 112145877249560. Its totient is φ = 110098403468352.

The previous prime is 111122101202173. The next prime is 111122101202257. The reversal of 111122101202221 is 122202101221111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11621376452196 + 99500724750025 = 3409014^2 + 9975005^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111122101202221 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 (111122101202291) 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, 16725510 + ... + 22405063.

It is an arithmetic number, because the mean of its divisors is an integer number (14018234656195).

Almost surely, 2^{111122101202221} is an apocalyptic number.

It is an amenable number.

111122101202221 is a deficient number, since it is larger than the sum of its proper divisors (1023776047339).

111122101202221 is a wasteful number, since it uses less digits than its factorization.

111122101202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39156735.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111122101202221 its reverse (122202101221111), we get a palindrome (233324202423332).

The spelling of 111122101202221 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred one million, two hundred two thousand, two hundred twenty-one".