1011112021 has 4 divisors (see below), whose sum is σ = 1017166752. Its totient is φ = 1005057292.

The previous prime is 1011111991. The next prime is 1011112049. The reversal of 1011112021 is 1202111101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011112021 - 2¹¹ = 1011109973 is a prime.

It is a super-3 number, since 3×1011112021³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011111989 and 1011112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011112321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027115 + ... + 3027448.

It is an arithmetic number, because the mean of its divisors is an integer number (254291688).

Almost surely, 2^1011112021 is an apocalyptic number.

It is an amenable number.

1011112021 is a deficient number, since it is larger than the sum of its proper divisors (6054731).

1011112021 is an equidigital number, since it uses as much as digits as its factorization.

1011112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054730.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1011112021 is about 31797.9876879025. The cubic root of 1011112021 is about 1003.6903714060.

Adding to 1011112021 its reverse (1202111101), we get a palindrome (2213223122).

The spelling of 1011112021 in words is "one billion, eleven million, one hundred twelve thousand, twenty-one".