2121000102 has 48 divisors (see below), whose sum is σ = 4997105568. Its totient is φ = 646272000.

The previous prime is 2121000059. The next prime is 2121000109. The reversal of 2121000102 is 2010001212.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121000109) 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 23 ways as a sum of consecutive naturals, for example, 19899 + ... + 68102.

It is an arithmetic number, because the mean of its divisors is an integer number (104106366).

Almost surely, 2^2121000102 is an apocalyptic number.

2121000102 is an abundant number, since it is smaller than the sum of its proper divisors (2876105466).

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

2121000102 is a wasteful number, since it uses less digits than its factorization.

2121000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88125 (or 88122 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2121000102 is about 46054.3168660659. The cubic root of 2121000102 is about 1284.8336326678.

Adding to 2121000102 its reverse (2010001212), we get a palindrome (4131001314).

The spelling of 2121000102 in words is "two billion, one hundred twenty-one million, one hundred two", and thus it is an aban number.