212123414243 has 16 divisors (see below), whose sum is σ = 238392999936. Its totient is φ = 187277043360.

The previous prime is 212123414231. The next prime is 212123414257. The reversal of 212123414243 is 342414321212.

It is a cyclic number.

It is not a de Polignac number, because 212123414243 - 2⁴ = 212123414227 is a prime.

It is a super-3 number, since 3×212123414243³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212123414203) 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, 4799978 + ... + 4843968.

It is an arithmetic number, because the mean of its divisors is an integer number (14899562496).

Almost surely, 2^212123414243 is an apocalyptic number.

212123414243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212123414243 is a deficient number, since it is larger than the sum of its proper divisors (26269585693).

212123414243 is a wasteful number, since it uses less digits than its factorization.

212123414243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60154.

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

Adding to 212123414243 its reverse (342414321212), we get a palindrome (554537735455).

The spelling of 212123414243 in words is "two hundred twelve billion, one hundred twenty-three million, four hundred fourteen thousand, two hundred forty-three".