1200111112121 has 8 divisors (see below), whose sum is σ = 1228035721440. Its totient is φ = 1172187186912.

The previous prime is 1200111112099. The next prime is 1200111112147. The reversal of 1200111112121 is 1212111110021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200111112121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200111112096 and 1200111112105.

It is not an unprimeable number, because it can be changed into a prime (1200111114121) 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, 5679266 + ... + 5886788.

It is an arithmetic number, because the mean of its divisors is an integer number (153504465180).

Almost surely, 2^{1200111112121} is an apocalyptic number.

It is an amenable number.

1200111112121 is a deficient number, since it is larger than the sum of its proper divisors (27924609319).

1200111112121 is a wasteful number, since it uses less digits than its factorization.

1200111112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342055.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1200111112121 its reverse (1212111110021), we get a palindrome (2412222222142).

The spelling of 1200111112121 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred twelve thousand, one hundred twenty-one".