121243042031 has 2 divisors, whose sum is σ = 121243042032. Its totient is φ = 121243042030.

The previous prime is 121243041991. The next prime is 121243042049. The reversal of 121243042031 is 130240342121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121243042031 is a prime.

It is a super-2 number, since 2×121243042031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121243041988 and 121243042006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121243042631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621521015 + 60621521016.

It is an arithmetic number, because the mean of its divisors is an integer number (60621521016).

Almost surely, 2^121243042031 is an apocalyptic number.

121243042031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121243042031 is an equidigital number, since it uses as much as digits as its factorization.

121243042031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121243042031 its reverse (130240342121), we get a palindrome (251483384152).

The spelling of 121243042031 in words is "one hundred twenty-one billion, two hundred forty-three million, forty-two thousand, thirty-one".