26572129121 has 2 divisors, whose sum is σ = 26572129122. Its totient is φ = 26572129120.

The previous prime is 26572129117. The next prime is 26572129141. The reversal of 26572129121 is 12192127562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13378160896 + 13193968225 = 115664^2 + 114865^2 .

It is a cyclic number.

It is not a de Polignac number, because 26572129121 - 2² = 26572129117 is a prime.

It is not a weakly prime, because it can be changed into another prime (26572129141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13286064560 + 13286064561.

It is an arithmetic number, because the mean of its divisors is an integer number (13286064561).

Almost surely, 2^26572129121 is an apocalyptic number.

It is an amenable number.

26572129121 is a deficient number, since it is larger than the sum of its proper divisors (1).

26572129121 is an equidigital number, since it uses as much as digits as its factorization.

26572129121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The spelling of 26572129121 in words is "twenty-six billion, five hundred seventy-two million, one hundred twenty-nine thousand, one hundred twenty-one".