2100102212121 has 8 divisors (see below), whose sum is σ = 2800143715200. Its totient is φ = 1400064425232.

The previous prime is 2100102212077. The next prime is 2100102212123. The reversal of 2100102212121 is 1212122010012.

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

It is not a de Polignac number, because 2100102212121 - 2⁷ = 2100102211993 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100102212121.

It is not an unprimeable number, because it can be changed into a prime (2100102212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909151 + ... + 2242043.

It is an arithmetic number, because the mean of its divisors is an integer number (350017964400).

Almost surely, 2^{2100102212121} is an apocalyptic number.

It is an amenable number.

2100102212121 is a deficient number, since it is larger than the sum of its proper divisors (700041503079).

2100102212121 is a wasteful number, since it uses less digits than its factorization.

2100102212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858095.

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

Adding to 2100102212121 its reverse (1212122010012), we get a palindrome (3312224222133).

The spelling of 2100102212121 in words is "two trillion, one hundred billion, one hundred two million, two hundred twelve thousand, one hundred twenty-one".