212021131243 has 2 divisors, whose sum is σ = 212021131244. Its totient is φ = 212021131242.

The previous prime is 212021131229. The next prime is 212021131247. The reversal of 212021131243 is 342131120212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021131243 is a prime.

It is a super-2 number, since 2×212021131243² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212021131247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010565621 + 106010565622.

It is an arithmetic number, because the mean of its divisors is an integer number (106010565622).

Almost surely, 2^212021131243 is an apocalyptic number.

212021131243 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021131243 is an equidigital number, since it uses as much as digits as its factorization.

212021131243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 212021131243 its reverse (342131120212), we get a palindrome (554152251455).

The spelling of 212021131243 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-one thousand, two hundred forty-three".