121861223 has 4 divisors (see below), whose sum is σ = 132939528. Its totient is φ = 110782920.

The previous prime is 121861211. The next prime is 121861241. The reversal of 121861223 is 322168121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322168121 = 11 ⋅29288011.

It is a cyclic number.

It is not a de Polignac number, because 121861223 - 2⁸ = 121860967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121861192 and 121861201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121861273) 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, 5539136 + ... + 5539157.

It is an arithmetic number, because the mean of its divisors is an integer number (33234882).

Almost surely, 2^121861223 is an apocalyptic number.

121861223 is a deficient number, since it is larger than the sum of its proper divisors (11078305).

121861223 is a wasteful number, since it uses less digits than its factorization.

121861223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078304.

The product of its digits is 1152, while the sum is 26.

The square root of 121861223 is about 11039.0770900470. The cubic root of 121861223 is about 495.7794379540.

The spelling of 121861223 in words is "one hundred twenty-one million, eight hundred sixty-one thousand, two hundred twenty-three".