121762720126 has 16 divisors (see below), whose sum is σ = 185925287520. Its totient is φ = 59790710880.

The previous prime is 121762720109. The next prime is 121762720127. The reversal of 121762720126 is 621027267121.

121762720126 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121762720127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692361 + ... + 850228.

It is an arithmetic number, because the mean of its divisors is an integer number (11620330470).

Almost surely, 2^121762720126 is an apocalyptic number.

121762720126 is a deficient number, since it is larger than the sum of its proper divisors (64162567394).

121762720126 is a wasteful number, since it uses less digits than its factorization.

121762720126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543299.

The product of its (nonzero) digits is 28224, while the sum is 37.

Adding to 121762720126 its reverse (621027267121), we get a palindrome (742789987247).

The spelling of 121762720126 in words is "one hundred twenty-one billion, seven hundred sixty-two million, seven hundred twenty thousand, one hundred twenty-six".