1121021020021 has 16 divisors (see below), whose sum is σ = 1299332309760. Its totient is φ = 947253605760.

The previous prime is 1121021019949. The next prime is 1121021020057. The reversal of 1121021020021 is 1200201201211.

It is not a de Polignac number, because 1121021020021 - 2⁷ = 1121021019893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121021019983 and 1121021020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121021024021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5551195 + ... + 5749591.

It is an arithmetic number, because the mean of its divisors is an integer number (81208269360).

Almost surely, 2^{1121021020021} is an apocalyptic number.

It is an amenable number.

1121021020021 is a deficient number, since it is larger than the sum of its proper divisors (178311289739).

1121021020021 is a wasteful number, since it uses less digits than its factorization.

1121021020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209844.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1121021020021 its reverse (1200201201211), we get a palindrome (2321222221232).

The spelling of 1121021020021 in words is "one trillion, one hundred twenty-one billion, twenty-one million, twenty thousand, twenty-one".