1112121020021 has 16 divisors (see below), whose sum is σ = 1269160714368. Its totient is φ = 964625745600.

The previous prime is 1112121020011. The next prime is 1112121020053. The reversal of 1112121020021 is 1200201212111.

It is not a de Polignac number, because 1112121020021 - 2¹⁰ = 1112121018997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112121019978 and 1112121020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112121020011) 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, 5435750 + ... + 5636631.

It is an arithmetic number, because the mean of its divisors is an integer number (79322544648).

Almost surely, 2^{1112121020021} is an apocalyptic number.

1112121020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1112121020021 is a deficient number, since it is larger than the sum of its proper divisors (157039694347).

1112121020021 is a wasteful number, since it uses less digits than its factorization.

1112121020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11072812.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1112121020021 its reverse (1200201212111), we get a palindrome (2312322232132).

The spelling of 1112121020021 in words is "one trillion, one hundred twelve billion, one hundred twenty-one million, twenty thousand, twenty-one".