121881101 has 4 divisors (see below), whose sum is σ = 123349632. Its totient is φ = 120412572.

The previous prime is 121881077. The next prime is 121881103. The reversal of 121881101 is 101188121.

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: 101188121 = 307 ⋅329603.

It is a cyclic number.

It is not a de Polignac number, because 121881101 - 2⁶ = 121881037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121881103) 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, 734141 + ... + 734306.

It is an arithmetic number, because the mean of its divisors is an integer number (30837408).

Almost surely, 2^121881101 is an apocalyptic number.

It is an amenable number.

121881101 is a deficient number, since it is larger than the sum of its proper divisors (1468531).

121881101 is an equidigital number, since it uses as much as digits as its factorization.

121881101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468530.

The product of its (nonzero) digits is 128, while the sum is 23.

The square root of 121881101 is about 11039.9774003392. The cubic root of 121881101 is about 495.8063936654.

The spelling of 121881101 in words is "one hundred twenty-one million, eight hundred eighty-one thousand, one hundred one".