552121021 has 4 divisors (see below), whose sum is σ = 552248032. Its totient is φ = 551994012.

The previous prime is 552120991. The next prime is 552121033. The reversal of 552121021 is 120121255.

552121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 552121021 - 2¹⁵ = 552088253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 552121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552121091) 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, 56745 + ... + 65758.

It is an arithmetic number, because the mean of its divisors is an integer number (138062008).

Almost surely, 2^552121021 is an apocalyptic number.

It is an amenable number.

552121021 is a deficient number, since it is larger than the sum of its proper divisors (127011).

552121021 is a wasteful number, since it uses less digits than its factorization.

552121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127010.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 552121021 is about 23497.2556057085. The cubic root of 552121021 is about 820.3731303051.

Adding to 552121021 its reverse (120121255), we get a palindrome (672242276).

The spelling of 552121021 in words is "five hundred fifty-two million, one hundred twenty-one thousand, twenty-one".