121220022111 has 4 divisors (see below), whose sum is σ = 161626696152. Its totient is φ = 80813348072.

The previous prime is 121220022109. The next prime is 121220022149. The reversal of 121220022111 is 111220022121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121220022111 - 2¹ = 121220022109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220022151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20203337016 + ... + 20203337021.

It is an arithmetic number, because the mean of its divisors is an integer number (40406674038).

Almost surely, 2^121220022111 is an apocalyptic number.

121220022111 is a deficient number, since it is larger than the sum of its proper divisors (40406674041).

121220022111 is an equidigital number, since it uses as much as digits as its factorization.

121220022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40406674040.

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

Adding to 121220022111 its reverse (111220022121), we get a palindrome (232440044232).

The spelling of 121220022111 in words is "one hundred twenty-one billion, two hundred twenty million, twenty-two thousand, one hundred eleven".