2102106621 has 16 divisors (see below), whose sum is σ = 2903932928. Its totient is φ = 1351177200.

The previous prime is 2102106599. The next prime is 2102106647. The reversal of 2102106621 is 1266012012.

It is not a de Polignac number, because 2102106621 - 2¹³ = 2102098429 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 (2102102621) 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, 16501 + ... + 66906.

It is an arithmetic number, because the mean of its divisors is an integer number (181495808).

Almost surely, 2^2102106621 is an apocalyptic number.

It is an amenable number.

2102106621 is a deficient number, since it is larger than the sum of its proper divisors (801826307).

2102106621 is a wasteful number, since it uses less digits than its factorization.

2102106621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83712.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2102106621 is about 45848.7363075581. The cubic root of 2102106621 is about 1281.0072274314.

Adding to 2102106621 its reverse (1266012012), we get a palindrome (3368118633).

The spelling of 2102106621 in words is "two billion, one hundred two million, one hundred six thousand, six hundred twenty-one".