1200321100111 has 16 divisors (see below), whose sum is σ = 1372695505920. Its totient is φ = 1028171944800.

The previous prime is 1200321100073. The next prime is 1200321100207. The reversal of 1200321100111 is 1110011230021.

It is a happy number.

It is not a de Polignac number, because 1200321100111 - 2¹⁵ = 1200321067343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200321100091 and 1200321100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200321104111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80816836 + ... + 80831686.

It is an arithmetic number, because the mean of its divisors is an integer number (85793469120).

Almost surely, 2^{1200321100111} is an apocalyptic number.

1200321100111 is a deficient number, since it is larger than the sum of its proper divisors (172374405809).

1200321100111 is a wasteful number, since it uses less digits than its factorization.

1200321100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21654.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1200321100111 its reverse (1110011230021), we get a palindrome (2310332330132).

The spelling of 1200321100111 in words is "one trillion, two hundred billion, three hundred twenty-one million, one hundred thousand, one hundred eleven".