1152123110221 has 4 divisors (see below), whose sum is σ = 1162890616032. Its totient is φ = 1141355604412.

The previous prime is 1152123110209. The next prime is 1152123110261. The reversal of 1152123110221 is 1220113212511.

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 1152123110221 - 2¹⁷ = 1152122979149 is a prime.

It is a super-2 number, since 2×1152123110221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1152123110192 and 1152123110201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152123110261) 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, 5383752745 + ... + 5383752958.

It is an arithmetic number, because the mean of its divisors is an integer number (290722654008).

Almost surely, 2^{1152123110221} is an apocalyptic number.

It is an amenable number.

1152123110221 is a deficient number, since it is larger than the sum of its proper divisors (10767505811).

1152123110221 is a wasteful number, since it uses less digits than its factorization.

1152123110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10767505810.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 1152123110221 its reverse (1220113212511), we get a palindrome (2372236322732).

The spelling of 1152123110221 in words is "one trillion, one hundred fifty-two billion, one hundred twenty-three million, one hundred ten thousand, two hundred twenty-one".