1121022021 has 32 divisors (see below), whose sum is σ = 1806197760. Its totient is φ = 604146816.

The previous prime is 1121022011. The next prime is 1121022043. The reversal of 1121022021 is 1202201211.

It is not a de Polignac number, because 1121022021 - 2²² = 1116827717 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121021988 and 1121022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121022011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84385 + ... + 96761.

It is an arithmetic number, because the mean of its divisors is an integer number (56443680).

Almost surely, 2^1121022021 is an apocalyptic number.

It is an amenable number.

1121022021 is a deficient number, since it is larger than the sum of its proper divisors (685175739).

1121022021 is a wasteful number, since it uses less digits than its factorization.

1121022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12633.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1121022021 is about 33481.6669387891. Note that the first 3 decimals coincide. The cubic root of 1121022021 is about 1038.8146075509.

Adding to 1121022021 its reverse (1202201211), we get a palindrome (2323223232).

The spelling of 1121022021 in words is "one billion, one hundred twenty-one million, twenty-two thousand, twenty-one".