111020220221221 has 4 divisors (see below), whose sum is σ = 114601517647744. Its totient is φ = 107438922794700.

The previous prime is 111020220221189. The next prime is 111020220221291. The reversal of 111020220221221 is 122122022020111.

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 cyclic number.

It is not a de Polignac number, because 111020220221221 - 2⁵ = 111020220221189 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 (111020220221291) 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, 1790648713215 + ... + 1790648713276.

It is an arithmetic number, because the mean of its divisors is an integer number (28650379411936).

Almost surely, 2^{111020220221221} is an apocalyptic number.

It is an amenable number.

111020220221221 is a deficient number, since it is larger than the sum of its proper divisors (3581297426523).

111020220221221 is an equidigital number, since it uses as much as digits as its factorization.

111020220221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581297426522.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111020220221221 its reverse (122122022020111), we get a palindrome (233142242241332).

The spelling of 111020220221221 in words is "one hundred eleven trillion, twenty billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".