213230121022121 has 16 divisors (see below), whose sum is σ = 247689705296640. Its totient is φ = 179770148642880.

The previous prime is 213230121022091. The next prime is 213230121022129. The reversal of 213230121022121 is 121220121032312.

213230121022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 213230121022121 - 2¹⁰ = 213230121021097 is a prime.

It is a super-2 number, since 2×213230121022121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213230121022129) 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, 30332735 + ... + 36695163.

It is an arithmetic number, because the mean of its divisors is an integer number (15480606581040).

Almost surely, 2^{213230121022121} is an apocalyptic number.

It is an amenable number.

213230121022121 is a deficient number, since it is larger than the sum of its proper divisors (34459584274519).

213230121022121 is an equidigital number, since it uses as much as digits as its factorization.

213230121022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440984.

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

Adding to 213230121022121 its reverse (121220121032312), we get a palindrome (334450242054433).

The spelling of 213230121022121 in words is "two hundred thirteen trillion, two hundred thirty billion, one hundred twenty-one million, twenty-two thousand, one hundred twenty-one".