1225027444621 has 2 divisors, whose sum is σ = 1225027444622. Its totient is φ = 1225027444620.

The previous prime is 1225027444493. The next prime is 1225027444687. The reversal of 1225027444621 is 1264447205221.

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., 761804278596 + 463223166025 = 872814^2 + 680605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225027444621 - 2⁷ = 1225027444493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225027444021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612513722310 + 612513722311.

It is an arithmetic number, because the mean of its divisors is an integer number (612513722311).

Almost surely, 2^{1225027444621} is an apocalyptic number.

It is an amenable number.

1225027444621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225027444621 is an equidigital number, since it uses as much as digits as its factorization.

1225027444621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 1225027444621 in words is "one trillion, two hundred twenty-five billion, twenty-seven million, four hundred forty-four thousand, six hundred twenty-one".