70445221421 has 4 divisors (see below), whose sum is σ = 70515879612. Its totient is φ = 70374563232.

The previous prime is 70445221403. The next prime is 70445221423. The reversal of 70445221421 is 12412254407.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29352255625 + 41092965796 = 171325^2 + 202714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70445221421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70445221423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35327600 + ... + 35329593.

It is an arithmetic number, because the mean of its divisors is an integer number (17628969903).

Almost surely, 2^70445221421 is an apocalyptic number.

It is an amenable number.

70445221421 is a deficient number, since it is larger than the sum of its proper divisors (70658191).

70445221421 is an equidigital number, since it uses as much as digits as its factorization.

70445221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70658190.

The product of its (nonzero) digits is 17920, while the sum is 32.

Adding to 70445221421 its reverse (12412254407), we get a palindrome (82857475828).

The spelling of 70445221421 in words is "seventy billion, four hundred forty-five million, two hundred twenty-one thousand, four hundred twenty-one".