2102120222201 has 4 divisors (see below), whose sum is σ = 2102146432500. Its totient is φ = 2102094011904.

The previous prime is 2102120222159. The next prime is 2102120222327. The reversal of 2102120222201 is 1022220212012.

It is a happy number.

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 1654050637801 + 448069584400 = 1286099^2 + 669380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102120222201 - 2¹⁴ = 2102120205817 is a prime.

It is a super-2 number, since 2×2102120222201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102120222201.

It is not an unprimeable number, because it can be changed into a prime (2102120222101) 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, 12984476 + ... + 13145373.

It is an arithmetic number, because the mean of its divisors is an integer number (525536608125).

Almost surely, 2^{2102120222201} is an apocalyptic number.

It is an amenable number.

2102120222201 is a deficient number, since it is larger than the sum of its proper divisors (26210299).

2102120222201 is an equidigital number, since it uses as much as digits as its factorization.

2102120222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26210298.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2102120222201 its reverse (1022220212012), we get a palindrome (3124340434213).

The spelling of 2102120222201 in words is "two trillion, one hundred two billion, one hundred twenty million, two hundred twenty-two thousand, two hundred one".