1122021021 has 16 divisors (see below), whose sum is σ = 1645524288. Its totient is φ = 680010320.

The previous prime is 1122021011. The next prime is 1122021031. The reversal of 1122021021 is 1201202211.

It is an interprime number because it is at equal distance from previous prime (1122021011) and next prime (1122021031).

It is not a de Polignac number, because 1122021021 - 2¹¹ = 1122018973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1122020988 and 1122021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122021001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136506 + ... + 144491.

It is an arithmetic number, because the mean of its divisors is an integer number (102845268).

Almost surely, 2^1122021021 is an apocalyptic number.

1122021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122021021 is a deficient number, since it is larger than the sum of its proper divisors (523503267).

1122021021 is an equidigital number, since it uses as much as digits as its factorization.

1122021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281033 (or 281011 counting only the distinct ones).

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

The square root of 1122021021 is about 33496.5822286394. The cubic root of 1122021021 is about 1039.1230961903.

Adding to 1122021021 its reverse (1201202211), we get a palindrome (2323223232).

The spelling of 1122021021 in words is "one billion, one hundred twenty-two million, twenty-one thousand, twenty-one".