120021541 has 4 divisors (see below), whose sum is σ = 120197952. Its totient is φ = 119845132.

The previous prime is 120021533. The next prime is 120021571. The reversal of 120021541 is 145120021.

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: 145120021 = 31 ⋅4681291.

It is a cyclic number.

It is not a de Polignac number, because 120021541 - 2³ = 120021533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87181 + ... + 88546.

It is an arithmetic number, because the mean of its divisors is an integer number (30049488).

Almost surely, 2^120021541 is an apocalyptic number.

It is an amenable number.

120021541 is a deficient number, since it is larger than the sum of its proper divisors (176411).

120021541 is an equidigital number, since it uses as much as digits as its factorization.

120021541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176410.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 120021541 is about 10955.4343136181. The cubic root of 120021541 is about 493.2719268082.

Adding to 120021541 its reverse (145120021), we get a palindrome (265141562).

The spelling of 120021541 in words is "one hundred twenty million, twenty-one thousand, five hundred forty-one".