725520141221 has 2 divisors, whose sum is σ = 725520141222. Its totient is φ = 725520141220.

The previous prime is 725520141167. The next prime is 725520141253. The reversal of 725520141221 is 122141025527.

It is an a-pointer prime, because the next prime (725520141253) can be obtained adding 725520141221 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714048660196 + 11471481025 = 845014^2 + 107105^2 .

It is a cyclic number.

It is not a de Polignac number, because 725520141221 - 2¹⁴ = 725520124837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725520141271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362760070610 + 362760070611.

It is an arithmetic number, because the mean of its divisors is an integer number (362760070611).

Almost surely, 2^725520141221 is an apocalyptic number.

It is an amenable number.

725520141221 is a deficient number, since it is larger than the sum of its proper divisors (1).

725520141221 is an equidigital number, since it uses as much as digits as its factorization.

725520141221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 32.

Adding to 725520141221 its reverse (122141025527), we get a palindrome (847661166748).

The spelling of 725520141221 in words is "seven hundred twenty-five billion, five hundred twenty million, one hundred forty-one thousand, two hundred twenty-one".