1011121112021 has 16 divisors (see below), whose sum is σ = 1018008492480. Its totient is φ = 1004263079040.

The previous prime is 1011121111991. The next prime is 1011121112039. The reversal of 1011121112021 is 1202111211101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011121112021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1011121111987 and 1011121112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011121172021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112806086 + ... + 112815048.

It is an arithmetic number, because the mean of its divisors is an integer number (63625530780).

Almost surely, 2^{1011121112021} is an apocalyptic number.

It is an amenable number.

1011121112021 is a deficient number, since it is larger than the sum of its proper divisors (6887380459).

1011121112021 is an equidigital number, since it uses as much as digits as its factorization.

1011121112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1011121112021 its reverse (1202111211101), we get a palindrome (2213232323122).

The spelling of 1011121112021 in words is "one trillion, eleven billion, one hundred twenty-one million, one hundred twelve thousand, twenty-one".