55231500121001 has 8 divisors (see below), whose sum is σ = 55473066145224. Its totient is φ = 54989972737920.

The previous prime is 55231500120977. The next prime is 55231500121003. The reversal of 55231500121001 is 10012100513255.

It can be written as a sum of positive squares in 4 ways, for example, as 7308777075625 + 47922723045376 = 2703475^2 + 6922624^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55231500121001 - 2²² = 55231495926697 is a prime.

It is a super-2 number, since 2×55231500121001² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55231500121003) 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, 6793490 + ... + 12514571.

It is an arithmetic number, because the mean of its divisors is an integer number (6934133268153).

Almost surely, 2^{55231500121001} is an apocalyptic number.

It is an amenable number.

55231500121001 is a deficient number, since it is larger than the sum of its proper divisors (241566024223).

55231500121001 is a wasteful number, since it uses less digits than its factorization.

55231500121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19320571.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 55231500121001 its reverse (10012100513255), we get a palindrome (65243600634256).

The spelling of 55231500121001 in words is "fifty-five trillion, two hundred thirty-one billion, five hundred million, one hundred twenty-one thousand, one".