1212122121043 has 2 divisors, whose sum is σ = 1212122121044. Its totient is φ = 1212122121042.

The previous prime is 1212122121037. The next prime is 1212122121107. The reversal of 1212122121043 is 3401212212121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212122121043 - 2²⁹ = 1211585250131 is a prime.

It is a super-2 number, since 2×1212122121043² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212122121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061060521 + 606061060522.

It is an arithmetic number, because the mean of its divisors is an integer number (606061060522).

Almost surely, 2^{1212122121043} is an apocalyptic number.

1212122121043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212122121043 is an equidigital number, since it uses as much as digits as its factorization.

1212122121043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 1212122121043 its reverse (3401212212121), we get a palindrome (4613334333164).

The spelling of 1212122121043 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, forty-three".