121220110121 has 8 divisors (see below), whose sum is σ = 140018950944. Its totient is φ = 103717741120.

The previous prime is 121220110103. The next prime is 121220110157. The reversal of 121220110121 is 121011022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121220110121 - 2³⁰ = 120146368297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220110096 and 121220110105.

It is not an unprimeable number, because it can be changed into a prime (121220110621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324117755 + ... + 324118128.

It is an arithmetic number, because the mean of its divisors is an integer number (17502368868).

Almost surely, 2^121220110121 is an apocalyptic number.

121220110121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121220110121 is a deficient number, since it is larger than the sum of its proper divisors (18798840823).

121220110121 is a wasteful number, since it uses less digits than its factorization.

121220110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648235911.

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

Adding to 121220110121 its reverse (121011022121), we get a palindrome (242231132242).

The spelling of 121220110121 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-one".