1125721521151 has 2 divisors, whose sum is σ = 1125721521152. Its totient is φ = 1125721521150.

The previous prime is 1125721521143. The next prime is 1125721521191. The reversal of 1125721521151 is 1511251275211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125721521151 - 2³ = 1125721521143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125721521101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562860760575 + 562860760576.

It is an arithmetic number, because the mean of its divisors is an integer number (562860760576).

Almost surely, 2^{1125721521151} is an apocalyptic number.

1125721521151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125721521151 is an equidigital number, since it uses as much as digits as its factorization.

1125721521151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7000, while the sum is 34.

Adding to 1125721521151 its reverse (1511251275211), we get a palindrome (2636972796362).

The spelling of 1125721521151 in words is "one trillion, one hundred twenty-five billion, seven hundred twenty-one million, five hundred twenty-one thousand, one hundred fifty-one".