1212210121123 has 2 divisors, whose sum is σ = 1212210121124. Its totient is φ = 1212210121122.

The previous prime is 1212210121103. The next prime is 1212210121183. The reversal of 1212210121123 is 3211210122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212210121123 - 2¹³ = 1212210112931 is a prime.

It is a super-2 number, since 2×1212210121123² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212210121123.

It is not a weakly prime, because it can be changed into another prime (1212210121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105060561 + 606105060562.

It is an arithmetic number, because the mean of its divisors is an integer number (606105060562).

Almost surely, 2^{1212210121123} is an apocalyptic number.

1212210121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212210121123 is an equidigital number, since it uses as much as digits as its factorization.

1212210121123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1212210121123 its reverse (3211210122121), we get a palindrome (4423420243244).

The spelling of 1212210121123 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, one hundred twenty-three".