1021211121 has 8 divisors (see below), whose sum is σ = 1556131264. Its totient is φ = 583549200.

The previous prime is 1021211033. The next prime is 1021211129. The reversal of 1021211121 is 1211121201.

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

It is not a de Polignac number, because 1021211121 - 2⁹ = 1021210609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021211097 and 1021211106.

It is not an unprimeable number, because it can be changed into a prime (1021211129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24314530 + ... + 24314571.

It is an arithmetic number, because the mean of its divisors is an integer number (194516408).

Almost surely, 2^1021211121 is an apocalyptic number.

It is an amenable number.

1021211121 is a deficient number, since it is larger than the sum of its proper divisors (534920143).

1021211121 is an equidigital number, since it uses as much as digits as its factorization.

1021211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48629111.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1021211121 is about 31956.3940550244. The cubic root of 1021211121 is about 1007.0209643624.

Adding to 1021211121 its reverse (1211121201), we get a palindrome (2232332322).

The spelling of 1021211121 in words is "one billion, twenty-one million, two hundred eleven thousand, one hundred twenty-one".