121200203231 has 2 divisors, whose sum is σ = 121200203232. Its totient is φ = 121200203230.

The previous prime is 121200203213. The next prime is 121200203233. The reversal of 121200203231 is 132302002121.

Together with previous prime (121200203213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121200203231 - 2⁶ = 121200203167 is a prime.

It is a super-2 number, since 2×121200203231² (a number of 23 digits) contains 22 as substring.

Together with 121200203233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121200203233) 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 as a sum of consecutive naturals, namely, 60600101615 + 60600101616.

It is an arithmetic number, because the mean of its divisors is an integer number (60600101616).

Almost surely, 2^121200203231 is an apocalyptic number.

121200203231 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200203231 is an equidigital number, since it uses as much as digits as its factorization.

121200203231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 121200203231 its reverse (132302002121), we get a palindrome (253502205352).

The spelling of 121200203231 in words is "one hundred twenty-one billion, two hundred million, two hundred three thousand, two hundred thirty-one".