70207121 has 2 divisors, whose sum is σ = 70207122. Its totient is φ = 70207120.

The previous prime is 70207079. The next prime is 70207133. The reversal of 70207121 is 12170207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68145025 + 2062096 = 8255^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 70207121 - 2¹⁴ = 70190737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70207093 and 70207102.

It is not a weakly prime, because it can be changed into another prime (70207141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35103560 + 35103561.

It is an arithmetic number, because the mean of its divisors is an integer number (35103561).

Almost surely, 2^70207121 is an apocalyptic number.

It is an amenable number.

70207121 is a deficient number, since it is larger than the sum of its proper divisors (1).

70207121 is an equidigital number, since it uses as much as digits as its factorization.

70207121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 70207121 is about 8378.9689699867. The cubic root of 70207121 is about 412.5346081768.

Adding to 70207121 its reverse (12170207), we get a palindrome (82377328).

It can be divided in two parts, 7020 and 7121, that added together give a palindrome (14141).

The spelling of 70207121 in words is "seventy million, two hundred seven thousand, one hundred twenty-one".