20102301251 has 2 divisors, whose sum is σ = 20102301252. Its totient is φ = 20102301250.

The previous prime is 20102301203. The next prime is 20102301301. The reversal of 20102301251 is 15210320102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102301251 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102304251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051150625 + 10051150626.

It is an arithmetic number, because the mean of its divisors is an integer number (10051150626).

Almost surely, 2^20102301251 is an apocalyptic number.

20102301251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102301251 is an equidigital number, since it uses as much as digits as its factorization.

20102301251 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.

Adding to 20102301251 its reverse (15210320102), we get a palindrome (35312621353).

The spelling of 20102301251 in words is "twenty billion, one hundred two million, three hundred one thousand, two hundred fifty-one".