1120212121 has 16 divisors (see below), whose sum is σ = 1291863424. Its totient is φ = 951502464.

The previous prime is 1120212097. The next prime is 1120212133. The reversal of 1120212121 is 1212120211.

It is a cyclic number.

It is not a de Polignac number, because 1120212121 - 2¹⁷ = 1120081049 is a prime.

It is a Duffinian number.

1120212121 is a modest number, since divided by 212121 gives 1120 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1120212151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451741 + ... + 454213.

It is an arithmetic number, because the mean of its divisors is an integer number (80741464).

Almost surely, 2^1120212121 is an apocalyptic number.

It is an amenable number.

1120212121 is a deficient number, since it is larger than the sum of its proper divisors (171651303).

1120212121 is a wasteful number, since it uses less digits than its factorization.

1120212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1120212121 is about 33469.5700749203. The cubic root of 1120212121 is about 1038.5643779603.

Adding to 1120212121 its reverse (1212120211), we get a palindrome (2332332332).

The spelling of 1120212121 in words is "one billion, one hundred twenty million, two hundred twelve thousand, one hundred twenty-one".