111010220121 has 4 divisors (see below), whose sum is σ = 148013626832. Its totient is φ = 74006813412.

The previous prime is 111010220089. The next prime is 111010220147. The reversal of 111010220121 is 121022010111.

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 not a de Polignac number, because 111010220121 - 2⁵ = 111010220089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111010220097 and 111010220106.

It is not an unprimeable number, because it can be changed into a prime (111010222121) 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, 18501703351 + ... + 18501703356.

It is an arithmetic number, because the mean of its divisors is an integer number (37003406708).

Almost surely, 2^111010220121 is an apocalyptic number.

It is an amenable number.

111010220121 is a deficient number, since it is larger than the sum of its proper divisors (37003406711).

111010220121 is an equidigital number, since it uses as much as digits as its factorization.

111010220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37003406710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111010220121 its reverse (121022010111), we get a palindrome (232032230232).

The spelling of 111010220121 in words is "one hundred eleven billion, ten million, two hundred twenty thousand, one hundred twenty-one".