121220231 has 8 divisors (see below), whose sum is σ = 135466128. Its totient is φ = 107512000.

The previous prime is 121220213. The next prime is 121220243. The reversal of 121220231 is 132022121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121220231 - 2⁶ = 121220167 is a prime.

It is a super-2 number, since 2×121220231² = 29388688807386722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133940 + ... + 134841.

It is an arithmetic number, because the mean of its divisors is an integer number (16933266).

Almost surely, 2^121220231 is an apocalyptic number.

121220231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121220231 is a deficient number, since it is larger than the sum of its proper divisors (14245897).

121220231 is a wasteful number, since it uses less digits than its factorization.

121220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268833.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121220231 is about 11010.0059491355. The cubic root of 121220231 is about 494.9086400789.

Adding to 121220231 its reverse (132022121), we get a palindrome (253242352).

The spelling of 121220231 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred thirty-one".