1121234021 has 4 divisors (see below), whose sum is σ = 1145090112. Its totient is φ = 1097377932.

The previous prime is 1121233913. The next prime is 1121234033. The reversal of 1121234021 is 1204321211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121234021 - 2¹⁸ = 1120971877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121234321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11927975 + ... + 11928068.

It is an arithmetic number, because the mean of its divisors is an integer number (286272528).

Almost surely, 2^1121234021 is an apocalyptic number.

It is an amenable number.

1121234021 is a deficient number, since it is larger than the sum of its proper divisors (23856091).

1121234021 is an equidigital number, since it uses as much as digits as its factorization.

1121234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23856090.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1121234021 is about 33484.8327007916. The cubic root of 1121234021 is about 1038.8800879225.

Adding to 1121234021 its reverse (1204321211), we get a palindrome (2325555232).

The spelling of 1121234021 in words is "one billion, one hundred twenty-one million, two hundred thirty-four thousand, twenty-one".