1200012121121 has 8 divisors (see below), whose sum is σ = 1309273863744. Its totient is φ = 1090778667120.

The previous prime is 1200012121031. The next prime is 1200012121159. The reversal of 1200012121121 is 1211212100021.

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 1200012121121 - 2¹⁴ = 1200012104737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200012121096 and 1200012121105.

It is not an unprimeable number, because it can be changed into a prime (1200012121181) 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, 6983405 + ... + 7153178.

It is an arithmetic number, because the mean of its divisors is an integer number (163659232968).

Almost surely, 2^{1200012121121} is an apocalyptic number.

1200012121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200012121121 is a deficient number, since it is larger than the sum of its proper divisors (109261742623).

1200012121121 is a wasteful number, since it uses less digits than its factorization.

1200012121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14144311.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1200012121121 its reverse (1211212100021), we get a palindrome (2411224221142).

It can be divided in two parts, 12000 and 12121121, that added together give a palindrome (12133121).

The spelling of 1200012121121 in words is "one trillion, two hundred billion, twelve million, one hundred twenty-one thousand, one hundred twenty-one".