54102121 has 4 divisors (see below), whose sum is σ = 54710100. Its totient is φ = 53494144.

The previous prime is 54102107. The next prime is 54102131. The reversal of 54102121 is 12120145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12120145 = 5 ⋅2424029.

It can be written as a sum of positive squares in 2 ways, for example, as 29550096 + 24552025 = 5436^2 + 4955^2 .

It is a cyclic number.

It is not a de Polignac number, because 54102121 - 2⁹ = 54101609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54102095 and 54102104.

It is not an unprimeable number, because it can be changed into a prime (54102131) 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, 303856 + ... + 304033.

It is an arithmetic number, because the mean of its divisors is an integer number (13677525).

Almost surely, 2^54102121 is an apocalyptic number.

It is an amenable number.

54102121 is a deficient number, since it is larger than the sum of its proper divisors (607979).

54102121 is an equidigital number, since it uses as much as digits as its factorization.

54102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607978.

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

The square root of 54102121 is about 7355.4144002904. The cubic root of 54102121 is about 378.2144323307.

Adding to 54102121 its reverse (12120145), we get a palindrome (66222266).

The spelling of 54102121 in words is "fifty-four million, one hundred two thousand, one hundred twenty-one".