120819503281 has 3 divisors (see below), whose sum is σ = 120819850873. Its totient is φ = 120819155690.

The previous prime is 120819503197. The next prime is 120819503293. The reversal of 120819503281 is 182305918021.

The square root of 120819503281 is 347591.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 182305918021 = 3727 ⋅48914923.

It is not a de Polignac number, because 120819503281 - 2³⁵ = 86459764913 is a prime.

It is a super-2 number, since 2×120819503281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120819500281) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 173796 + ... + 521386.

Almost surely, 2^120819503281 is an apocalyptic number.

120819503281 is the 347591-st square number.

120819503281 is the 173796-th centered octagonal number.

It is an amenable number.

120819503281 is a deficient number, since it is larger than the sum of its proper divisors (347592).

120819503281 is an frugal number, since it uses more digits than its factorization.

120819503281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695182 (or 347591 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

It can be divided in two parts, 120819 and 503281, that added together give a square (624100 = 790²).

The spelling of 120819503281 in words is "one hundred twenty billion, eight hundred nineteen million, five hundred three thousand, two hundred eighty-one".