213133230121 has 16 divisors (see below), whose sum is σ = 249409695744. Its totient is φ = 178319577744.

The previous prime is 213133230077. The next prime is 213133230133. The reversal of 213133230121 is 121032331312.

It is not a de Polignac number, because 213133230121 - 2¹⁹ = 213132705833 is a prime.

It is a super-2 number, since 2×213133230121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213133230092 and 213133230101.

It is not an unprimeable number, because it can be changed into a prime (213133230181) 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, 225960 + ... + 690886.

It is an arithmetic number, because the mean of its divisors is an integer number (15588105984).

Almost surely, 2^213133230121 is an apocalyptic number.

It is an amenable number.

213133230121 is a deficient number, since it is larger than the sum of its proper divisors (36276465623).

213133230121 is a wasteful number, since it uses less digits than its factorization.

213133230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466500.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213133230121 its reverse (121032331312), we get a palindrome (334165561433).

The spelling of 213133230121 in words is "two hundred thirteen billion, one hundred thirty-three million, two hundred thirty thousand, one hundred twenty-one".