445121004421 has 2 divisors, whose sum is σ = 445121004422. Its totient is φ = 445121004420.

The previous prime is 445121004407. The next prime is 445121004431. The reversal of 445121004421 is 124400121544.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387562277025 + 57558727396 = 622545^2 + 239914^2 .

It is a cyclic number.

It is not a de Polignac number, because 445121004421 - 2³⁵ = 410761266053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445121004421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445121004431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222560502210 + 222560502211.

It is an arithmetic number, because the mean of its divisors is an integer number (222560502211).

Almost surely, 2^445121004421 is an apocalyptic number.

It is an amenable number.

445121004421 is a deficient number, since it is larger than the sum of its proper divisors (1).

445121004421 is an equidigital number, since it uses as much as digits as its factorization.

445121004421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 445121004421 its reverse (124400121544), we get a palindrome (569521125965).

The spelling of 445121004421 in words is "four hundred forty-five billion, one hundred twenty-one million, four thousand, four hundred twenty-one".