121222022121 has 8 divisors (see below), whose sum is σ = 179588180960. Its totient is φ = 80814681396.

The previous prime is 121222022101. The next prime is 121222022161. The reversal of 121222022121 is 121220222121.

It is a happy number.

It is not a de Polignac number, because 121222022121 - 2¹⁵ = 121221989353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222022094 and 121222022103.

It is not an unprimeable number, because it can be changed into a prime (121222022101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244852235 + ... + 2244852288.

It is an arithmetic number, because the mean of its divisors is an integer number (22448522620).

Almost surely, 2^121222022121 is an apocalyptic number.

It is an amenable number.

121222022121 is a deficient number, since it is larger than the sum of its proper divisors (58366158839).

121222022121 is an equidigital number, since it uses as much as digits as its factorization.

121222022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489704532 (or 4489704526 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121222022121 its reverse (121220222121), we get a palindrome (242442244242).

The spelling of 121222022121 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".