23211332121221 has 4 divisors (see below), whose sum is σ = 23359175001132. Its totient is φ = 23063489241312.

The previous prime is 23211332121203. The next prime is 23211332121269. The reversal of 23211332121221 is 12212123311232.

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 6830978140996 + 16380353980225 = 2613614^2 + 4047265^2 .

It is a cyclic number.

It is not a de Polignac number, because 23211332121221 - 2³⁰ = 23210258379397 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 (23211332121521) 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, 73921439720 + ... + 73921440033.

It is an arithmetic number, because the mean of its divisors is an integer number (5839793750283).

Almost surely, 2^{23211332121221} is an apocalyptic number.

It is an amenable number.

23211332121221 is a deficient number, since it is larger than the sum of its proper divisors (147842879911).

23211332121221 is a wasteful number, since it uses less digits than its factorization.

23211332121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147842879910.

The product of its digits is 1728, while the sum is 26.

Adding to 23211332121221 its reverse (12212123311232), we get a palindrome (35423455432453).

The spelling of 23211332121221 in words is "twenty-three trillion, two hundred eleven billion, three hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".