2121002102 has 8 divisors (see below), whose sum is σ = 3181745016. Its totient is φ = 1060420432.

The previous prime is 2121002101. The next prime is 2121002123. The reversal of 2121002102 is 2012001212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121002101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073 + ... + 65139.

It is an arithmetic number, because the mean of its divisors is an integer number (397718127).

Almost surely, 2^2121002102 is an apocalyptic number.

2121002102 is a deficient number, since it is larger than the sum of its proper divisors (1060742914).

2121002102 is a wasteful number, since it uses less digits than its factorization.

2121002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80622.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2121002102 is about 46054.3385795519. The cubic root of 2121002102 is about 1284.8340365129.

Adding to 2121002102 its reverse (2012001212), we get a palindrome (4133003314).

The spelling of 2121002102 in words is "two billion, one hundred twenty-one million, two thousand, one hundred two".