1225540525123 has 2 divisors, whose sum is σ = 1225540525124. Its totient is φ = 1225540525122.

The previous prime is 1225540525109. The next prime is 1225540525247. The reversal of 1225540525123 is 3215250455221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225540525123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225540555123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612770262561 + 612770262562.

It is an arithmetic number, because the mean of its divisors is an integer number (612770262562).

Almost surely, 2^{1225540525123} is an apocalyptic number.

1225540525123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225540525123 is an equidigital number, since it uses as much as digits as its factorization.

1225540525123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 1225540525123 in words is "one trillion, two hundred twenty-five billion, five hundred forty million, five hundred twenty-five thousand, one hundred twenty-three".