1020251140251 has 8 divisors (see below), whose sum is σ = 1554668404224. Its totient is φ = 583000651560.

The previous prime is 1020251140177. The next prime is 1020251140277. The reversal of 1020251140251 is 1520411520201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020251140251 - 2³⁷ = 882812186779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020251141251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24291693795 + ... + 24291693836.

It is an arithmetic number, because the mean of its divisors is an integer number (194333550528).

Almost surely, 2^{1020251140251} is an apocalyptic number.

1020251140251 is a deficient number, since it is larger than the sum of its proper divisors (534417263973).

1020251140251 is an equidigital number, since it uses as much as digits as its factorization.

1020251140251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48583387641.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 1020251140251 its reverse (1520411520201), we get a palindrome (2540662660452).

The spelling of 1020251140251 in words is "one trillion, twenty billion, two hundred fifty-one million, one hundred forty thousand, two hundred fifty-one".