70022021 has 2 divisors, whose sum is σ = 70022022. Its totient is φ = 70022020.

The previous prime is 70022003. The next prime is 70022041. The reversal of 70022021 is 12022007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59459521 + 10562500 = 7711^2 + 3250^2 .

It is an emirp because it is prime and its reverse (12022007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70022021 - 2²² = 65827717 is a prime.

It is a super-3 number, since 3×70022021³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70021987 and 70022005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70022041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35011010 + 35011011.

It is an arithmetic number, because the mean of its divisors is an integer number (35011011).

Almost surely, 2^70022021 is an apocalyptic number.

It is an amenable number.

70022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

70022021 is an equidigital number, since it uses as much as digits as its factorization.

70022021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 70022021 is about 8367.9161683181. The cubic root of 70022021 is about 412.1717420325.

Subtracting from 70022021 its sum of digits (14), we obtain a palindrome (70022007).

Adding to 70022021 its reverse (12022007), we get a palindrome (82044028).

The spelling of 70022021 in words is "seventy million, twenty-two thousand, twenty-one".