2121021101 has 8 divisors (see below), whose sum is σ = 2127513600. Its totient is φ = 2114538160.

The previous prime is 2121021079. The next prime is 2121021103. The reversal of 2121021101 is 1011201212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121021101 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 (2121021103) 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, 817316 + ... + 819906.

It is an arithmetic number, because the mean of its divisors is an integer number (265939200).

Almost surely, 2^2121021101 is an apocalyptic number.

It is an amenable number.

2121021101 is a deficient number, since it is larger than the sum of its proper divisors (6492499).

2121021101 is a wasteful number, since it uses less digits than its factorization.

2121021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779.

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

The square root of 2121021101 is about 46054.5448463015. The cubic root of 2121021101 is about 1284.8378728267.

Adding to 2121021101 its reverse (1011201212), we get a palindrome (3132222313).

The spelling of 2121021101 in words is "two billion, one hundred twenty-one million, twenty-one thousand, one hundred one".