122001211121 has 4 divisors (see below), whose sum is σ = 122002337700. Its totient is φ = 122000084544.

The previous prime is 122001211099. The next prime is 122001211153. The reversal of 122001211121 is 121112100221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121112100221 = 7 ⋅17301728603.

It can be written as a sum of positive squares in 2 ways, for example, as 67039566400 + 54961644721 = 258920^2 + 234439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122001211121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122001211096 and 122001211105.

It is not an unprimeable number, because it can be changed into a prime (122001211181) 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, 381236 + ... + 623973.

It is an arithmetic number, because the mean of its divisors is an integer number (30500584425).

Almost surely, 2^122001211121 is an apocalyptic number.

It is an amenable number.

122001211121 is a deficient number, since it is larger than the sum of its proper divisors (1126579).

122001211121 is a wasteful number, since it uses less digits than its factorization.

122001211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126578.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 122001211121 its reverse (121112100221), we get a palindrome (243113311342).

The spelling of 122001211121 in words is "one hundred twenty-two billion, one million, two hundred eleven thousand, one hundred twenty-one".