1121221057 has 8 divisors (see below), whose sum is σ = 1223943840. Its totient is φ = 1018630560.

The previous prime is 1121221033. The next prime is 1121221061. The reversal of 1121221057 is 7501221211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121221057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121221067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14908 + ... + 49645.

It is an arithmetic number, because the mean of its divisors is an integer number (152992980).

Almost surely, 2^1121221057 is an apocalyptic number.

It is an amenable number.

1121221057 is a deficient number, since it is larger than the sum of its proper divisors (102722783).

1121221057 is a wasteful number, since it uses less digits than its factorization.

1121221057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66143.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 1121221057 is about 33484.6391200503. The cubic root of 1121221057 is about 1038.8760839730.

Adding to 1121221057 its reverse (7501221211), we get a palindrome (8622442268).

The spelling of 1121221057 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, fifty-seven".