23121547229169 has 9 divisors (see below), whose sum is σ = 33397811278923. Its totient is φ = 15414355202472.

The previous prime is 23121547229119. The next prime is 23121547229191. The reversal of 23121547229169 is 96192274512132.

The square root of 23121547229169 is 4808487.

It is a perfect power (a square), and thus also a powerful number.

23121547229169 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 1 + 5 + 472 + 2 + 9 + 169 = 666.

It can be written as a sum of positive squares in only one way, i.e., 760186940769 + 22361360288400 = 871887^2 + 4728780^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 23121547229169 - 2²⁷ = 23121413011441 is a prime.

It is a super-2 number, since 2×23121547229169² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23121547229119) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13624047 + ... + 15226875.

Almost surely, 2^{23121547229169} is an apocalyptic number.

23121547229169 is the 4808487-th square number.

23121547229169 is the 2404244-th centered octagonal number.

It is an amenable number.

23121547229169 is a deficient number, since it is larger than the sum of its proper divisors (10276264049754).

23121547229169 is an frugal number, since it uses more digits than its factorization.

23121547229169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205664 (or 1602832 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 23121547229169 in words is "twenty-three trillion, one hundred twenty-one billion, five hundred forty-seven million, two hundred twenty-nine thousand, one hundred sixty-nine".