1122013221 has 36 divisors (see below), whose sum is σ = 1764014112. Its totient is φ = 632516976.

The previous prime is 1122013181. The next prime is 1122013223. The reversal of 1122013221 is 1223102211.

It is not a de Polignac number, because 1122013221 - 2⁶ = 1122013157 is a prime.

It is a super-3 number, since 3×1122013221³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1122013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122013223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 916816 + ... + 918038.

It is an arithmetic number, because the mean of its divisors is an integer number (49000392).

Almost surely, 2^1122013221 is an apocalyptic number.

It is an amenable number.

1122013221 is a deficient number, since it is larger than the sum of its proper divisors (642000891).

1122013221 is an equidigital number, since it uses as much as digits as its factorization.

1122013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1122013221 is about 33496.4657986481. The cubic root of 1122013221 is about 1039.1206882797.

Adding to 1122013221 its reverse (1223102211), we get a palindrome (2345115432).

The spelling of 1122013221 in words is "one billion, one hundred twenty-two million, thirteen thousand, two hundred twenty-one".