125511521342 has 4 divisors (see below), whose sum is σ = 188267282016. Its totient is φ = 62755760670.

The previous prime is 125511521329. The next prime is 125511521353. The reversal of 125511521342 is 243125115521.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 125511521299 and 125511521308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31377880334 + ... + 31377880337.

It is an arithmetic number, because the mean of its divisors is an integer number (47066820504).

Almost surely, 2^125511521342 is an apocalyptic number.

125511521342 is a deficient number, since it is larger than the sum of its proper divisors (62755760674).

125511521342 is an equidigital number, since it uses as much as digits as its factorization.

125511521342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62755760673.

The product of its digits is 12000, while the sum is 32.

Adding to 125511521342 its reverse (243125115521), we get a palindrome (368636636863).

The spelling of 125511521342 in words is "one hundred twenty-five billion, five hundred eleven million, five hundred twenty-one thousand, three hundred forty-two".