1121053221 has 12 divisors (see below), whose sum is σ = 1619593248. Its totient is φ = 747233064.

The previous prime is 1121053211. The next prime is 1121053267. The reversal of 1121053221 is 1223501211.

1121053221 is a `hidden beast` number, since 112 + 1 + 0 + 532 + 21 = 666.

It is not a de Polignac number, because 1121053221 - 2¹⁰ = 1121052197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121053194 and 1121053203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121053211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78586 + ... + 91748.

It is an arithmetic number, because the mean of its divisors is an integer number (134966104).

Almost surely, 2^1121053221 is an apocalyptic number.

It is an amenable number.

1121053221 is a deficient number, since it is larger than the sum of its proper divisors (498540027).

1121053221 is a wasteful number, since it uses less digits than its factorization.

1121053221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22632 (or 22629 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1121053221 is about 33482.1328621699. The cubic root of 1121053221 is about 1038.8242448029.

Adding to 1121053221 its reverse (1223501211), we get a palindrome (2344554432).

The spelling of 1121053221 in words is "one billion, one hundred twenty-one million, fifty-three thousand, two hundred twenty-one".