1112121120021 has 16 divisors (see below), whose sum is σ = 1570075651584. Its totient is φ = 697791573504.

The previous prime is 1112121120017. The next prime is 1112121120073. The reversal of 1112121120021 is 1200211212111.

It is a happy number.

It is not a de Polignac number, because 1112121120021 - 2² = 1112121120017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112121120001) 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, 5413641 + ... + 5615313.

It is an arithmetic number, because the mean of its divisors is an integer number (98129728224).

Almost surely, 2^{1112121120021} is an apocalyptic number.

It is an amenable number.

1112121120021 is a deficient number, since it is larger than the sum of its proper divisors (457954531563).

1112121120021 is a wasteful number, since it uses less digits than its factorization.

1112121120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309820.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1112121120021 its reverse (1200211212111), we get a palindrome (2312332332132).

The spelling of 1112121120021 in words is "one trillion, one hundred twelve billion, one hundred twenty-one million, one hundred twenty thousand, twenty-one".