122112111001 has 4 divisors (see below), whose sum is σ = 129295176372. Its totient is φ = 114929045632.

The previous prime is 122112110969. The next prime is 122112111049. The reversal of 122112111001 is 100111211221.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 101863105600 + 20249005401 = 319160^2 + 142299^2 .

It is not a de Polignac number, because 122112111001 - 2⁵ = 122112110969 is a prime.

It is a super-2 number, since 2×122112111001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122112111701) 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, 3591532660 + ... + 3591532693.

It is an arithmetic number, because the mean of its divisors is an integer number (32323794093).

Almost surely, 2^122112111001 is an apocalyptic number.

It is an amenable number.

122112111001 is a deficient number, since it is larger than the sum of its proper divisors (7183065371).

122112111001 is an equidigital number, since it uses as much as digits as its factorization.

122112111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183065370.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 122112111001 its reverse (100111211221), we get a palindrome (222223322222).

It can be divided in two parts, 12211 and 2111001, that added together give a palindrome (2123212).

The spelling of 122112111001 in words is "one hundred twenty-two billion, one hundred twelve million, one hundred eleven thousand, one".