23011222032221 has 4 divisors (see below), whose sum is σ = 24364823328252. Its totient is φ = 21657620736192.

The previous prime is 23011222032181. The next prime is 23011222032223. The reversal of 23011222032221 is 12223022211032.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19247567712025 + 3763654320196 = 4387205^2 + 1940014^2 .

It is a cyclic number.

It is not a de Polignac number, because 23011222032221 - 2³⁰ = 23010148290397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011222032223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676800647990 + ... + 676800648023.

It is an arithmetic number, because the mean of its divisors is an integer number (6091205832063).

Almost surely, 2^{23011222032221} is an apocalyptic number.

It is an amenable number.

23011222032221 is a deficient number, since it is larger than the sum of its proper divisors (1353601296031).

23011222032221 is a wasteful number, since it uses less digits than its factorization.

23011222032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353601296030.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 23011222032221 its reverse (12223022211032), we get a palindrome (35234244243253).

The spelling of 23011222032221 in words is "twenty-three trillion, eleven billion, two hundred twenty-two million, thirty-two thousand, two hundred twenty-one".