70103021 has 2 divisors, whose sum is σ = 70103022. Its totient is φ = 70103020.

The previous prime is 70103003. The next prime is 70103051. The reversal of 70103021 is 12030107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52345225 + 17757796 = 7235^2 + 4214^2 .

It is a cyclic number.

It is not a de Polignac number, because 70103021 - 2⁶ = 70102957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70102987 and 70103005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70103051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35051510 + 35051511.

It is an arithmetic number, because the mean of its divisors is an integer number (35051511).

Almost surely, 2^70103021 is an apocalyptic number.

It is an amenable number.

70103021 is a deficient number, since it is larger than the sum of its proper divisors (1).

70103021 is an equidigital number, since it uses as much as digits as its factorization.

70103021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 70103021 is about 8372.7546840929. The cubic root of 70103021 is about 412.3306113212.

Adding to 70103021 its reverse (12030107), we get a palindrome (82133128).

The spelling of 70103021 in words is "seventy million, one hundred three thousand, twenty-one".