212442243105 has 16 divisors (see below), whose sum is σ = 339920933760. Its totient is φ = 113298081408.

The previous prime is 212442243089. The next prime is 212442243107. The reversal of 212442243105 is 501342244212.

It is a happy number.

It is not a de Polignac number, because 212442243105 - 2⁴ = 212442243089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212442243107) 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, 136749 + ... + 666021.

It is an arithmetic number, because the mean of its divisors is an integer number (21245058360).

Almost surely, 2^212442243105 is an apocalyptic number.

It is an amenable number.

212442243105 is a deficient number, since it is larger than the sum of its proper divisors (127478690655).

212442243105 is a wasteful number, since it uses less digits than its factorization.

212442243105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556040.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 212442243105 its reverse (501342244212), we get a palindrome (713784487317).

The spelling of 212442243105 in words is "two hundred twelve billion, four hundred forty-two million, two hundred forty-three thousand, one hundred five".