121980231 has 12 divisors (see below), whose sum is σ = 180956152. Its totient is φ = 79122096.

The previous prime is 121980217. The next prime is 121980239. The reversal of 121980231 is 132089121.

121980231 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 121980231 - 2⁹ = 121979719 is a prime.

It is a super-2 number, since 2×121980231² = 29758353509626722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121980195 and 121980204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121980239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182821 + ... + 183486.

Almost surely, 2^121980231 is an apocalyptic number.

121980231 is a deficient number, since it is larger than the sum of its proper divisors (58975921).

121980231 is a wasteful number, since it uses less digits than its factorization.

121980231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366350 (or 366347 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 121980231 is about 11044.4660803499. The cubic root of 121980231 is about 495.9407759130.

The spelling of 121980231 in words is "one hundred twenty-one million, nine hundred eighty thousand, two hundred thirty-one".