1121230021 has 8 divisors (see below), whose sum is σ = 1132185600. Its totient is φ = 1110327120.

The previous prime is 1121230003. The next prime is 1121230037. The reversal of 1121230021 is 1200321211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121230021 - 2²⁹ = 584359109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121229983 and 1121230010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121230001) 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, 30300 + ... + 56218.

It is an arithmetic number, because the mean of its divisors is an integer number (141523200).

Almost surely, 2^1121230021 is an apocalyptic number.

It is an amenable number.

1121230021 is a deficient number, since it is larger than the sum of its proper divisors (10955579).

1121230021 is a wasteful number, since it uses less digits than its factorization.

1121230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26339.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1121230021 is about 33484.7729722034. The cubic root of 1121230021 is about 1038.8788525202.

Adding to 1121230021 its reverse (1200321211), we get a palindrome (2321551232).

The spelling of 1121230021 in words is "one billion, one hundred twenty-one million, two hundred thirty thousand, twenty-one".