212211331 has 2 divisors, whose sum is σ = 212211332. Its totient is φ = 212211330.

The previous prime is 212211277. The next prime is 212211341. The reversal of 212211331 is 133112212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212211331 - 2¹³ = 212203139 is a prime.

It is a super-2 number, since 2×212211331² = 90067298009583122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212211341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105665 + 106105666.

It is an arithmetic number, because the mean of its divisors is an integer number (106105666).

Almost surely, 2^212211331 is an apocalyptic number.

212211331 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211331 is an equidigital number, since it uses as much as digits as its factorization.

212211331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 16.

The square root of 212211331 is about 14567.4751072380. The cubic root of 212211331 is about 596.4712604957.

Adding to 212211331 its reverse (133112212), we get a palindrome (345323543).

The spelling of 212211331 in words is "two hundred twelve million, two hundred eleven thousand, three hundred thirty-one".