23154202121 has 8 divisors (see below), whose sum is σ = 23191677000. Its totient is φ = 23116750720.

The previous prime is 23154202111. The next prime is 23154202151. The reversal of 23154202121 is 12120245132.

It can be written as a sum of positive squares in 4 ways, for example, as 544568896 + 22609633225 = 23336^2 + 150365^2 .

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 23154202121 - 2²⁶ = 23087093257 is a prime.

It is a super-2 number, since 2×23154202121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23154202111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515051 + ... + 3521631.

It is an arithmetic number, because the mean of its divisors is an integer number (2898959625).

Almost surely, 2^23154202121 is an apocalyptic number.

It is an amenable number.

23154202121 is a deficient number, since it is larger than the sum of its proper divisors (37474879).

23154202121 is an equidigital number, since it uses as much as digits as its factorization.

23154202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11739.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 23154202121 its reverse (12120245132), we get a palindrome (35274447253).

The spelling of 23154202121 in words is "twenty-three billion, one hundred fifty-four million, two hundred two thousand, one hundred twenty-one".