213013101121 has 4 divisors (see below), whose sum is σ = 220358380500. Its totient is φ = 205667821744.

The previous prime is 213013101113. The next prime is 213013101167. The reversal of 213013101121 is 121101310312.

It is a happy number.

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 47332353600 + 165680747521 = 217560^2 + 407039^2 .

It is a cyclic number.

It is not a de Polignac number, because 213013101121 - 2³ = 213013101113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213013101095 and 213013101104.

It is not an unprimeable number, because it can be changed into a prime (213013101421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3672639646 + ... + 3672639703.

It is an arithmetic number, because the mean of its divisors is an integer number (55089595125).

Almost surely, 2^213013101121 is an apocalyptic number.

It is an amenable number.

213013101121 is a deficient number, since it is larger than the sum of its proper divisors (7345279379).

213013101121 is an equidigital number, since it uses as much as digits as its factorization.

213013101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7345279378.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 213013101121 its reverse (121101310312), we get a palindrome (334114411433).

The spelling of 213013101121 in words is "two hundred thirteen billion, thirteen million, one hundred one thousand, one hundred twenty-one".