1325220522421 has 2 divisors, whose sum is σ = 1325220522422. Its totient is φ = 1325220522420.

The previous prime is 1325220522419. The next prime is 1325220522467. The reversal of 1325220522421 is 1242250225231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 692288897521 + 632931624900 = 832039^2 + 795570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325220522421 - 2¹ = 1325220522419 is a prime.

Together with 1325220522419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325220522491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662610261210 + 662610261211.

It is an arithmetic number, because the mean of its divisors is an integer number (662610261211).

Almost surely, 2^{1325220522421} is an apocalyptic number.

It is an amenable number.

1325220522421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325220522421 is an equidigital number, since it uses as much as digits as its factorization.

1325220522421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 1325220522421 its reverse (1242250225231), we get a palindrome (2567470747652).

The spelling of 1325220522421 in words is "one trillion, three hundred twenty-five billion, two hundred twenty million, five hundred twenty-two thousand, four hundred twenty-one".