212143400440013 has 12 divisors (see below), whose sum is σ = 246781506551580. Its totient is φ = 181835395926912.

The previous prime is 212143400440007. The next prime is 212143400440061. The reversal of 212143400440013 is 310044004341212.

It can be written as a sum of positive squares in 2 ways, for example, as 39786990982249 + 172356409457764 = 6307693^2 + 13128458^2 .

It is not a de Polignac number, because 212143400440013 - 2¹² = 212143400435917 is a prime.

It is a super-2 number, since 2×212143400440013² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212143400440813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16481606 + ... + 26380487.

It is an arithmetic number, because the mean of its divisors is an integer number (20565125545965).

Almost surely, 2^{212143400440013} is an apocalyptic number.

It is an amenable number.

212143400440013 is a deficient number, since it is larger than the sum of its proper divisors (34638106111567).

212143400440013 is a wasteful number, since it uses less digits than its factorization.

212143400440013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42963116 (or 42963109 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 212143400440013 its reverse (310044004341212), we get a palindrome (522187404781225).

The spelling of 212143400440013 in words is "two hundred twelve trillion, one hundred forty-three billion, four hundred million, four hundred forty thousand, thirteen".