2011212121 has 8 divisors (see below), whose sum is σ = 2043468000. Its totient is φ = 1979171040.

The previous prime is 2011212107. The next prime is 2011212127. The reversal of 2011212121 is 1212121102.

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 2011212121 - 2¹⁵ = 2011179353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34771 + ... + 72328.

It is an arithmetic number, because the mean of its divisors is an integer number (255433500).

Almost surely, 2^2011212121 is an apocalyptic number.

It is an amenable number.

2011212121 is a deficient number, since it is larger than the sum of its proper divisors (32255879).

2011212121 is a wasteful number, since it uses less digits than its factorization.

2011212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107399.

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

The square root of 2011212121 is about 44846.5396769918. The cubic root of 2011212121 is about 1262.2710617911.

Adding to 2011212121 its reverse (1212121102), we get a palindrome (3223333223).

The spelling of 2011212121 in words is "two billion, eleven million, two hundred twelve thousand, one hundred twenty-one".