1212002122121 has 8 divisors (see below), whose sum is σ = 1385153638464. Its totient is φ = 1038852694800.

The previous prime is 1212002122103. The next prime is 1212002122127. The reversal of 1212002122121 is 1212212002121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212002122121 - 2¹⁸ = 1212001859977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212002122121.

It is not an unprimeable number, because it can be changed into a prime (1212002122127) 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 in 7 ways as a sum of consecutive naturals, for example, 1027631 + ... + 1865483.

It is an arithmetic number, because the mean of its divisors is an integer number (173144204808).

Almost surely, 2^{1212002122121} is an apocalyptic number.

It is an amenable number.

1212002122121 is a deficient number, since it is larger than the sum of its proper divisors (173151516343).

1212002122121 is an equidigital number, since it uses as much as digits as its factorization.

1212002122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044511.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212002122121 its reverse (1212212002121), we get a palindrome (2424214124242).

The spelling of 1212002122121 in words is "one trillion, two hundred twelve billion, two million, one hundred twenty-two thousand, one hundred twenty-one".