23311021212221 has 16 divisors (see below), whose sum is σ = 24186887359488. Its totient is φ = 22451392320000.

The previous prime is 23311021212209. The next prime is 23311021212229. The reversal of 23311021212221 is 12221212011332.

It is a cyclic number.

It is not a de Polignac number, because 23311021212221 - 2³⁸ = 23036143305277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311021212229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8860061 + ... + 11185826.

It is an arithmetic number, because the mean of its divisors is an integer number (1511680459968).

Almost surely, 2^{23311021212221} is an apocalyptic number.

It is an amenable number.

23311021212221 is a deficient number, since it is larger than the sum of its proper divisors (875866147267).

23311021212221 is a wasteful number, since it uses less digits than its factorization.

23311021212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20046292.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 23311021212221 its reverse (12221212011332), we get a palindrome (35532233223553).

The spelling of 23311021212221 in words is "twenty-three trillion, three hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred twenty-one".