120783835454521 has 4 divisors (see below), whose sum is σ = 122239062387792. Its totient is φ = 119328608521252.

The previous prime is 120783835454497. The next prime is 120783835454549. The reversal of 120783835454521 is 125454538387021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120783835454521 - 2¹⁹ = 120783834930233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120783835454021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727613466511 + ... + 727613466676.

It is an arithmetic number, because the mean of its divisors is an integer number (30559765596948).

Almost surely, 2^{120783835454521} is an apocalyptic number.

It is an amenable number.

120783835454521 is a deficient number, since it is larger than the sum of its proper divisors (1455226933271).

120783835454521 is an equidigital number, since it uses as much as digits as its factorization.

120783835454521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455226933270.

The product of its (nonzero) digits is 32256000, while the sum is 58.

The spelling of 120783835454521 in words is "one hundred twenty trillion, seven hundred eighty-three billion, eight hundred thirty-five million, four hundred fifty-four thousand, five hundred twenty-one".