1200212112121 has 8 divisors (see below), whose sum is σ = 1309509889344. Its totient is φ = 1090945599120.

The previous prime is 1200212112083. The next prime is 1200212112133. The reversal of 1200212112121 is 1212112120021.

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 1200212112121 - 2²⁵ = 1200178557689 is a prime.

It is a super-2 number, since 2×1200212112121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200212112095 and 1200212112104.

It is not an unprimeable number, because it can be changed into a prime (1200212112181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7735746 + ... + 7889371.

It is an arithmetic number, because the mean of its divisors is an integer number (163688736168).

Almost surely, 2^{1200212112121} is an apocalyptic number.

1200212112121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200212112121 is a deficient number, since it is larger than the sum of its proper divisors (109297777223).

1200212112121 is a wasteful number, since it uses less digits than its factorization.

1200212112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15632111.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1200212112121 its reverse (1212112120021), we get a palindrome (2412324232142).

The spelling of 1200212112121 in words is "one trillion, two hundred billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-one".