121102689 has 4 divisors (see below), whose sum is σ = 161470256. Its totient is φ = 80735124.

The previous prime is 121102687. The next prime is 121102717. The reversal of 121102689 is 986201121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 986201121 = 3 ⋅328733707.

It is not a de Polignac number, because 121102689 - 2¹ = 121102687 is a prime.

It is a super-2 number, since 2×121102689² = 29331722566061442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121102687) 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, 20183779 + ... + 20183784.

It is an arithmetic number, because the mean of its divisors is an integer number (40367564).

Almost surely, 2^121102689 is an apocalyptic number.

It is an amenable number.

121102689 is a deficient number, since it is larger than the sum of its proper divisors (40367567).

121102689 is an equidigital number, since it uses as much as digits as its factorization.

121102689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40367566.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 121102689 is about 11004.6666919085. Note that the first 4 decimals coincide. The cubic root of 121102689 is about 494.7486245339.

The spelling of 121102689 in words is "one hundred twenty-one million, one hundred two thousand, six hundred eighty-nine".