111022021222221 has 4 divisors (see below), whose sum is σ = 148029361629632. Its totient is φ = 74014680814812.

The previous prime is 111022021222187. The next prime is 111022021222247. The reversal of 111022021222221 is 122222120220111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-111022021222221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022021220221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18503670203701 + ... + 18503670203706.

It is an arithmetic number, because the mean of its divisors is an integer number (37007340407408).

Almost surely, 2^{111022021222221} is an apocalyptic number.

It is an amenable number.

111022021222221 is a deficient number, since it is larger than the sum of its proper divisors (37007340407411).

111022021222221 is an equidigital number, since it uses as much as digits as its factorization.

111022021222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37007340407410.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 111022021222221 its reverse (122222120220111), we get a palindrome (233244141442332).

The spelling of 111022021222221 in words is "one hundred eleven trillion, twenty-two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".