1020131251 has 2 divisors, whose sum is σ = 1020131252. Its totient is φ = 1020131250.

The previous prime is 1020131051. The next prime is 1020131267. The reversal of 1020131251 is 1521310201.

It is an a-pointer prime, because the next prime (1020131267) can be obtained adding 1020131251 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020131251 - 2⁹ = 1020130739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020131051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510065625 + 510065626.

It is an arithmetic number, because the mean of its divisors is an integer number (510065626).

Almost surely, 2^1020131251 is an apocalyptic number.

1020131251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020131251 is an equidigital number, since it uses as much as digits as its factorization.

1020131251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1020131251 is about 31939.4935933555. The cubic root of 1020131251 is about 1006.6658842564.

Adding to 1020131251 its reverse (1521310201), we get a palindrome (2541441452).

The spelling of 1020131251 in words is "one billion, twenty million, one hundred thirty-one thousand, two hundred fifty-one".