212222142543457 has 2 divisors, whose sum is σ = 212222142543458. Its totient is φ = 212222142543456.

The previous prime is 212222142543373. The next prime is 212222142543479. The reversal of 212222142543457 is 754345241222212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172852654254336 + 39369488289121 = 13147344^2 + 6274511^2 .

It is a cyclic number.

It is not a de Polignac number, because 212222142543457 - 2⁷ = 212222142543329 is a prime.

It is a super-3 number, since 3×212222142543457³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (212222142543157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111071271728 + 106111071271729.

It is an arithmetic number, because the mean of its divisors is an integer number (106111071271729).

Almost surely, 2^{212222142543457} is an apocalyptic number.

It is an amenable number.

212222142543457 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222142543457 is an equidigital number, since it uses as much as digits as its factorization.

212222142543457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2150400, while the sum is 46.

Adding to 212222142543457 its reverse (754345241222212), we get a palindrome (966567383765669).

The spelling of 212222142543457 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred forty-two million, five hundred forty-three thousand, four hundred fifty-seven".