220111022121 has 4 divisors (see below), whose sum is σ = 293481362832. Its totient is φ = 146740681412.

The previous prime is 220111022099. The next prime is 220111022149. The reversal of 220111022121 is 121220111022.

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 220111022121 - 2⁶ = 220111022057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220111022121.

It is not an unprimeable number, because it can be changed into a prime (220111020121) 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, 36685170351 + ... + 36685170356.

It is an arithmetic number, because the mean of its divisors is an integer number (73370340708).

Almost surely, 2^220111022121 is an apocalyptic number.

It is an amenable number.

220111022121 is a deficient number, since it is larger than the sum of its proper divisors (73370340711).

220111022121 is an equidigital number, since it uses as much as digits as its factorization.

220111022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73370340710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220111022121 its reverse (121220111022), we get a palindrome (341331133143).

It can be divided in two parts, 220111022 and 121, that multiplied together give a palindrome (26633433662).

The spelling of 220111022121 in words is "two hundred twenty billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".