553220121 has 8 divisors (see below), whose sum is σ = 738288160. Its totient is φ = 368482752.

The previous prime is 553220117. The next prime is 553220147. The reversal of 553220121 is 121022355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 553220121 - 2² = 553220117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (553220621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78736 + ... + 85473.

It is an arithmetic number, because the mean of its divisors is an integer number (92286020).

Almost surely, 2^553220121 is an apocalyptic number.

It is an amenable number.

553220121 is a deficient number, since it is larger than the sum of its proper divisors (185068039).

553220121 is a wasteful number, since it uses less digits than its factorization.

553220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165335.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 553220121 is about 23520.6318154934. The cubic root of 553220121 is about 820.9171381214.

Adding to 553220121 its reverse (121022355), we get a palindrome (674242476).

The spelling of 553220121 in words is "five hundred fifty-three million, two hundred twenty thousand, one hundred twenty-one".