1225222225181 has 2 divisors, whose sum is σ = 1225222225182. Its totient is φ = 1225222225180.

The previous prime is 1225222225151. The next prime is 1225222225193. The reversal of 1225222225181 is 1815222225221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697951639225 + 527270585956 = 835435^2 + 726134^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225222225181 - 2¹⁰ = 1225222224157 is a prime.

It is a super-2 number, since 2×1225222225181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225222225151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612611112590 + 612611112591.

It is an arithmetic number, because the mean of its divisors is an integer number (612611112591).

Almost surely, 2^{1225222225181} is an apocalyptic number.

It is an amenable number.

1225222225181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225222225181 is an equidigital number, since it uses as much as digits as its factorization.

1225222225181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25600, while the sum is 35.

The spelling of 1225222225181 in words is "one trillion, two hundred twenty-five billion, two hundred twenty-two million, two hundred twenty-five thousand, one hundred eighty-one".