1111121020021 has 8 divisors (see below), whose sum is σ = 1111690288800. Its totient is φ = 1110551901648.

The previous prime is 1111121020013. The next prime is 1111121020073. The reversal of 1111121020021 is 1200201211111.

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 1111121020021 - 2³ = 1111121020013 is a prime.

It is a super-2 number, since 2×1111121020021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111121019983 and 1111121020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111121020921) 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, 16563055 + ... + 16630003.

It is an arithmetic number, because the mean of its divisors is an integer number (138961286100).

Almost surely, 2^{1111121020021} is an apocalyptic number.

It is an amenable number.

1111121020021 is a deficient number, since it is larger than the sum of its proper divisors (569268779).

1111121020021 is an equidigital number, since it uses as much as digits as its factorization.

1111121020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75203.

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

Adding to 1111121020021 its reverse (1200201211111), we get a palindrome (2311322231132).

The spelling of 1111121020021 in words is "one trillion, one hundred eleven billion, one hundred twenty-one million, twenty thousand, twenty-one".