121102121 has 4 divisors (see below), whose sum is σ = 138402432. Its totient is φ = 103801812.

The previous prime is 121102049. The next prime is 121102129. The reversal of 121102121 is 121201121.

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 not a de Polignac number, because 121102121 - 2¹⁸ = 120839977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121102129) 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, 8650145 + ... + 8650158.

It is an arithmetic number, because the mean of its divisors is an integer number (34600608).

Almost surely, 2^121102121 is an apocalyptic number.

It is an amenable number.

121102121 is a deficient number, since it is larger than the sum of its proper divisors (17300311).

121102121 is an equidigital number, since it uses as much as digits as its factorization.

121102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17300310.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121102121 is about 11004.6408846450. The cubic root of 121102121 is about 494.7478510371.

Adding to 121102121 its reverse (121201121), we get a palindrome (242303242).

The spelling of 121102121 in words is "one hundred twenty-one million, one hundred two thousand, one hundred twenty-one".