121280012831 has 2 divisors, whose sum is σ = 121280012832. Its totient is φ = 121280012830.

The previous prime is 121280012827. The next prime is 121280012881. The reversal of 121280012831 is 138210082121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121280012831 - 2² = 121280012827 is a prime.

It is a super-2 number, since 2×121280012831² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121280012794 and 121280012803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121280012801) 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, 60640006415 + 60640006416.

It is an arithmetic number, because the mean of its divisors is an integer number (60640006416).

Almost surely, 2^121280012831 is an apocalyptic number.

121280012831 is a deficient number, since it is larger than the sum of its proper divisors (1).

121280012831 is an equidigital number, since it uses as much as digits as its factorization.

121280012831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 29.

Adding to 121280012831 its reverse (138210082121), we get a palindrome (259490094952).

The spelling of 121280012831 in words is "one hundred twenty-one billion, two hundred eighty million, twelve thousand, eight hundred thirty-one".