1200100020121 has 8 divisors (see below), whose sum is σ = 1228205795040. Its totient is φ = 1172319167712.

The previous prime is 1200100020103. The next prime is 1200100020139. The reversal of 1200100020121 is 1210200010021.

It is an interprime number because it is at equal distance from previous prime (1200100020103) and next prime (1200100020139).

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 1200100020121 - 2¹⁵ = 1200099987353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200100020098 and 1200100020107.

It is not an unprimeable number, because it can be changed into a prime (1200100020101) 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, 81223155 + ... + 81237928.

It is an arithmetic number, because the mean of its divisors is an integer number (153525724380).

Almost surely, 2^{1200100020121} is an apocalyptic number.

It is an amenable number.

1200100020121 is a deficient number, since it is larger than the sum of its proper divisors (28105774919).

1200100020121 is an equidigital number, since it uses as much as digits as its factorization.

1200100020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162461255.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200100020121 its reverse (1210200010021), we get a palindrome (2410300030142).

The spelling of 1200100020121 in words is "one trillion, two hundred billion, one hundred million, twenty thousand, one hundred twenty-one".