1200112111021 has 8 divisors (see below), whose sum is σ = 1206713263104. Its totient is φ = 1193529020640.

The previous prime is 1200112111019. The next prime is 1200112111049. The reversal of 1200112111021 is 1201112110021.

It is a happy number.

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 1200112111021 - 2¹ = 1200112111019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200112110992 and 1200112111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200112111091) 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, 4382160 + ... + 4647961.

It is an arithmetic number, because the mean of its divisors is an integer number (150839157888).

Almost surely, 2^{1200112111021} is an apocalyptic number.

It is an amenable number.

1200112111021 is a deficient number, since it is larger than the sum of its proper divisors (6601152083).

1200112111021 is an equidigital number, since it uses as much as digits as its factorization.

1200112111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030851.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1200112111021 its reverse (1201112110021), we get a palindrome (2401224221042).

The spelling of 1200112111021 in words is "one trillion, two hundred billion, one hundred twelve million, one hundred eleven thousand, twenty-one".