121323031 has 2 divisors, whose sum is σ = 121323032. Its totient is φ = 121323030.

The previous prime is 121323029. The next prime is 121323049. The reversal of 121323031 is 130323121.

It is a weak prime.

It is an emirp because it is prime and its reverse (130323121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121323031 - 2¹ = 121323029 is a prime.

It is a super-2 number, since 2×121323031² = 29438555702053922, which contains 22 as substring.

Together with 121323029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121322996 and 121323014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121323061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60661515 + 60661516.

It is an arithmetic number, because the mean of its divisors is an integer number (60661516).

Almost surely, 2^121323031 is an apocalyptic number.

121323031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121323031 is an equidigital number, since it uses as much as digits as its factorization.

121323031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 121323031 is about 11014.6734404611. The cubic root of 121323031 is about 495.0485018624.

Adding to 121323031 its reverse (130323121), we get a palindrome (251646152).

The spelling of 121323031 in words is "one hundred twenty-one million, three hundred twenty-three thousand, thirty-one".