121143031 has 4 divisors (see below), whose sum is σ = 127519000. Its totient is φ = 114767064.

The previous prime is 121143007. The next prime is 121143049. The reversal of 121143031 is 130341121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121143031 - 2⁵ = 121142999 is a prime.

It is a super-3 number, since 3×121143031³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121142996 and 121143014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3187956 + ... + 3187993.

It is an arithmetic number, because the mean of its divisors is an integer number (31879750).

Almost surely, 2^121143031 is an apocalyptic number.

121143031 is a deficient number, since it is larger than the sum of its proper divisors (6375969).

121143031 is an equidigital number, since it uses as much as digits as its factorization.

121143031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375968.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 121143031 is about 11006.4994889383. The cubic root of 121143031 is about 494.8035556928.

Adding to 121143031 its reverse (130341121), we get a palindrome (251484152).

The spelling of 121143031 in words is "one hundred twenty-one million, one hundred forty-three thousand, thirty-one".