1023120251 has 2 divisors, whose sum is σ = 1023120252. Its totient is φ = 1023120250.

The previous prime is 1023120223. The next prime is 1023120283. The reversal of 1023120251 is 1520213201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1023120251 - 2¹⁴ = 1023103867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023120211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511560125 + 511560126.

It is an arithmetic number, because the mean of its divisors is an integer number (511560126).

Almost surely, 2^1023120251 is an apocalyptic number.

1023120251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023120251 is an equidigital number, since it uses as much as digits as its factorization.

1023120251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1023120251 is about 31986.2509681894. The cubic root of 1023120251 is about 1007.6481076609.

Adding to 1023120251 its reverse (1520213201), we get a palindrome (2543333452).

The spelling of 1023120251 in words is "one billion, twenty-three million, one hundred twenty thousand, two hundred fifty-one".