2102002121121 has 8 divisors (see below), whose sum is σ = 3203050851264. Its totient is φ = 1201144069200.

The previous prime is 2102002121113. The next prime is 2102002121201. The reversal of 2102002121121 is 1211212002012.

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

It is not a de Polignac number, because 2102002121121 - 2³ = 2102002121113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102002121121.

It is not an unprimeable number, because it can be changed into a prime (2102002121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50047669530 + ... + 50047669571.

It is an arithmetic number, because the mean of its divisors is an integer number (400381356408).

Almost surely, 2^{2102002121121} is an apocalyptic number.

2102002121121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2102002121121 is a deficient number, since it is larger than the sum of its proper divisors (1101048730143).

2102002121121 is a wasteful number, since it uses less digits than its factorization.

2102002121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100095339111.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2102002121121 its reverse (1211212002012), we get a palindrome (3313214123133).

The spelling of 2102002121121 in words is "two trillion, one hundred two billion, two million, one hundred twenty-one thousand, one hundred twenty-one".