2102210022121 has 4 divisors (see below), whose sum is σ = 2293320024144. Its totient is φ = 1911100020100.

The previous prime is 2102210022091. The next prime is 2102210022137. The reversal of 2102210022121 is 1212200122012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2102210022121 - 2¹³ = 2102210013929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102210022095 and 2102210022104.

It is not an unprimeable number, because it can be changed into a prime (2102210022191) 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, 95555000995 + ... + 95555001016.

It is an arithmetic number, because the mean of its divisors is an integer number (573330006036).

Almost surely, 2^{2102210022121} is an apocalyptic number.

It is an amenable number.

2102210022121 is a deficient number, since it is larger than the sum of its proper divisors (191110002023).

2102210022121 is a wasteful number, since it uses less digits than its factorization.

2102210022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191110002022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2102210022121 its reverse (1212200122012), we get a palindrome (3314410144133).

The spelling of 2102210022121 in words is "two trillion, one hundred two billion, two hundred ten million, twenty-two thousand, one hundred twenty-one".