213442013121 has 16 divisors (see below), whose sum is σ = 303868916736. Its totient is φ = 132942647376.

The previous prime is 213442013117. The next prime is 213442013123. The reversal of 213442013121 is 121310244312.

It is not a de Polignac number, because 213442013121 - 2² = 213442013117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213442013091 and 213442013100.

It is not an unprimeable number, because it can be changed into a prime (213442013123) 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 15 ways as a sum of consecutive naturals, for example, 35966365 + ... + 35972298.

It is an arithmetic number, because the mean of its divisors is an integer number (18991807296).

Almost surely, 2^213442013121 is an apocalyptic number.

It is an amenable number.

213442013121 is a deficient number, since it is larger than the sum of its proper divisors (90426903615).

213442013121 is a wasteful number, since it uses less digits than its factorization.

213442013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71938732.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 213442013121 its reverse (121310244312), we get a palindrome (334752257433).

The spelling of 213442013121 in words is "two hundred thirteen billion, four hundred forty-two million, thirteen thousand, one hundred twenty-one".