233212102120021 has 4 divisors (see below), whose sum is σ = 233212153782700. Its totient is φ = 233212050457344.

The previous prime is 233212102119989. The next prime is 233212102120087. The reversal of 233212102120021 is 120021201212332.

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 156767052042225 + 76445050077796 = 12520665^2 + 8743286^2 .

It is a cyclic number.

It is not a de Polignac number, because 233212102120021 - 2⁵ = 233212102119989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233212102119974 and 233212102120001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233212102126021) 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, 18334986 + ... + 28330123.

It is an arithmetic number, because the mean of its divisors is an integer number (58303038445675).

Almost surely, 2^{233212102120021} is an apocalyptic number.

It is an amenable number.

233212102120021 is a deficient number, since it is larger than the sum of its proper divisors (51662679).

233212102120021 is an equidigital number, since it uses as much as digits as its factorization.

233212102120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51662678.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 233212102120021 its reverse (120021201212332), we get a palindrome (353233303332353).

The spelling of 233212102120021 in words is "two hundred thirty-three trillion, two hundred twelve billion, one hundred two million, one hundred twenty thousand, twenty-one".