70010251721 has 2 divisors, whose sum is σ = 70010251722. Its totient is φ = 70010251720.

The previous prime is 70010251687. The next prime is 70010251723. The reversal of 70010251721 is 12715201007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63435474496 + 6574777225 = 251864^2 + 81085^2 .

It is a cyclic number.

It is not a de Polignac number, because 70010251721 - 2⁶ = 70010251657 is a prime.

Together with 70010251723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70010251723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35005125860 + 35005125861.

It is an arithmetic number, because the mean of its divisors is an integer number (35005125861).

Almost surely, 2^70010251721 is an apocalyptic number.

It is an amenable number.

70010251721 is a deficient number, since it is larger than the sum of its proper divisors (1).

70010251721 is an equidigital number, since it uses as much as digits as its factorization.

70010251721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 980, while the sum is 26.

Adding to 70010251721 its reverse (12715201007), we get a palindrome (82725452728).

The spelling of 70010251721 in words is "seventy billion, ten million, two hundred fifty-one thousand, seven hundred twenty-one".