120741821 has 4 divisors (see below), whose sum is σ = 121692672. Its totient is φ = 119790972.

The previous prime is 120741811. The next prime is 120741851. The reversal of 120741821 is 128147021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 128147021 = 37 ⋅3463433.

It is a de Polignac number, because none of the positive numbers 2^k-120741821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120741811) 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, 475235 + ... + 475488.

It is an arithmetic number, because the mean of its divisors is an integer number (30423168).

Almost surely, 2^120741821 is an apocalyptic number.

It is an amenable number.

120741821 is a deficient number, since it is larger than the sum of its proper divisors (950851).

120741821 is an equidigital number, since it uses as much as digits as its factorization.

120741821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950850.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 120741821 is about 10988.2583242296. The cubic root of 120741821 is about 494.2567098288.

Adding to 120741821 its reverse (128147021), we get a palindrome (248888842).

The spelling of 120741821 in words is "one hundred twenty million, seven hundred forty-one thousand, eight hundred twenty-one".