10231121987 has 2 divisors, whose sum is σ = 10231121988. Its totient is φ = 10231121986.

The previous prime is 10231121981. The next prime is 10231122023. The reversal of 10231121987 is 78912113201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10231121987 - 2¹⁴ = 10231105603 is a prime.

It is a super-2 number, since 2×10231121987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10231121981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5115560993 + 5115560994.

It is an arithmetic number, because the mean of its divisors is an integer number (5115560994).

Almost surely, 2^10231121987 is an apocalyptic number.

10231121987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10231121987 is an equidigital number, since it uses as much as digits as its factorization.

10231121987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 10231121987 in words is "ten billion, two hundred thirty-one million, one hundred twenty-one thousand, nine hundred eighty-seven".