122211100121 has 4 divisors (see below), whose sum is σ = 133321200144. Its totient is φ = 111101000100.

The previous prime is 122211100111. The next prime is 122211100127. The reversal of 122211100121 is 121001112221.

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 a de Polignac number, because none of the positive numbers 2^k-122211100121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122211100096 and 122211100105.

It is not an unprimeable number, because it can be changed into a prime (122211100127) 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, 5555049995 + ... + 5555050016.

It is an arithmetic number, because the mean of its divisors is an integer number (33330300036).

Almost surely, 2^122211100121 is an apocalyptic number.

122211100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122211100121 is a deficient number, since it is larger than the sum of its proper divisors (11110100023).

122211100121 is a wasteful number, since it uses less digits than its factorization.

122211100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110100022.

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

Adding to 122211100121 its reverse (121001112221), we get a palindrome (243212212342).

The spelling of 122211100121 in words is "one hundred twenty-two billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".