1120021121 has 4 divisors (see below), whose sum is σ = 1120093872. Its totient is φ = 1119948372.

The previous prime is 1120021099. The next prime is 1120021171. The reversal of 1120021121 is 1211200211.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120021121 is a prime.

It is a super-2 number, since 2×1120021121² = 2508894622972193282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1120021171) 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, 3191 + ... + 47436.

It is an arithmetic number, because the mean of its divisors is an integer number (280023468).

Almost surely, 2^1120021121 is an apocalyptic number.

It is an amenable number.

1120021121 is a deficient number, since it is larger than the sum of its proper divisors (72751).

1120021121 is an equidigital number, since it uses as much as digits as its factorization.

1120021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72750.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1120021121 is about 33466.7166151686. The cubic root of 1120021121 is about 1038.5053483451.

Adding to 1120021121 its reverse (1211200211), we get a palindrome (2331221332).

The spelling of 1120021121 in words is "one billion, one hundred twenty million, twenty-one thousand, one hundred twenty-one".