1111020021021 has 8 divisors (see below), whose sum is σ = 1487506751104. Its totient is φ = 737606652480.

The previous prime is 1111020020983. The next prime is 1111020021043. The reversal of 1111020021021 is 1201200201111.

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

It is not a de Polignac number, because 1111020021021 - 2¹⁴ = 1111020004637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111020020988 and 1111020021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111020023021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768339541 + ... + 768340986.

It is an arithmetic number, because the mean of its divisors is an integer number (185938343888).

Almost surely, 2^{1111020021021} is an apocalyptic number.

It is an amenable number.

1111020021021 is a deficient number, since it is larger than the sum of its proper divisors (376486730083).

1111020021021 is a wasteful number, since it uses less digits than its factorization.

1111020021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536680771.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1111020021021 its reverse (1201200201111), we get a palindrome (2312220222132).

The spelling of 1111020021021 in words is "one trillion, one hundred eleven billion, twenty million, twenty-one thousand, twenty-one".