1121110221 has 32 divisors (see below), whose sum is σ = 1876064256. Its totient is φ = 578520000.

The previous prime is 1121110171. The next prime is 1121110231. The reversal of 1121110221 is 1220111211.

It is not a de Polignac number, because 1121110221 - 2¹⁸ = 1120848077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121110197 and 1121110206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121110231) 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, 18811 + ... + 50951.

It is an arithmetic number, because the mean of its divisors is an integer number (58627008).

Almost surely, 2^1121110221 is an apocalyptic number.

1121110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121110221 is a deficient number, since it is larger than the sum of its proper divisors (754954035).

1121110221 is a wasteful number, since it uses less digits than its factorization.

1121110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32313.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1121110221 is about 33482.9840516045. The cubic root of 1121110221 is about 1038.8418508592.

Adding to 1121110221 its reverse (1220111211), we get a palindrome (2341221432).

The spelling of 1121110221 in words is "one billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".