2121021102 has 32 divisors (see below), whose sum is σ = 4349318400. Its totient is φ = 689158080.

The previous prime is 2121021079. The next prime is 2121021103. The reversal of 2121021102 is 2011201212.

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 15 ways as a sum of consecutive naturals, for example, 341073 + ... + 347235.

It is an arithmetic number, because the mean of its divisors is an integer number (135916200).

Almost surely, 2^2121021102 is an apocalyptic number.

2121021102 is an abundant number, since it is smaller than the sum of its proper divisors (2228297298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121021102 is a wasteful number, since it uses less digits than its factorization.

2121021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7608.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2121021102 is about 46054.5448571582. The cubic root of 2121021102 is about 1284.8378730286.

Adding to 2121021102 its reverse (2011201212), we get a palindrome (4132222314).

The spelling of 2121021102 in words is "two billion, one hundred twenty-one million, twenty-one thousand, one hundred two".