70055212021 has 2 divisors, whose sum is σ = 70055212022. Its totient is φ = 70055212020.

The previous prime is 70055211997. The next prime is 70055212049. The reversal of 70055212021 is 12021255007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69796356100 + 258855921 = 264190^2 + 16089^2 .

It is an emirp because it is prime and its reverse (12021255007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70055212021 - 2⁹ = 70055211509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70055212121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35027606010 + 35027606011.

It is an arithmetic number, because the mean of its divisors is an integer number (35027606011).

Almost surely, 2^70055212021 is an apocalyptic number.

It is an amenable number.

70055212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

70055212021 is an equidigital number, since it uses as much as digits as its factorization.

70055212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

Adding to 70055212021 its reverse (12021255007), we get a palindrome (82076467028).

The spelling of 70055212021 in words is "seventy billion, fifty-five million, two hundred twelve thousand, twenty-one".