2210120002121 has 4 divisors (see below), whose sum is σ = 2212698906132. Its totient is φ = 2207541098112.

The previous prime is 2210120002039. The next prime is 2210120002169. The reversal of 2210120002121 is 1212000210122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1086307992121 + 1123812010000 = 1042261^2 + 1060100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210120002121 - 2¹⁸ = 2210119739977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210120002096 and 2210120002105.

It is not an unprimeable number, because it can be changed into a prime (2210120002921) 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, 1289450720 + ... + 1289452433.

It is an arithmetic number, because the mean of its divisors is an integer number (553174726533).

Almost surely, 2^{2210120002121} is an apocalyptic number.

It is an amenable number.

2210120002121 is a deficient number, since it is larger than the sum of its proper divisors (2578904011).

2210120002121 is an equidigital number, since it uses as much as digits as its factorization.

2210120002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578904010.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2210120002121 its reverse (1212000210122), we get a palindrome (3422120212243).

The spelling of 2210120002121 in words is "two trillion, two hundred ten billion, one hundred twenty million, two thousand, one hundred twenty-one".