2101200021202 has 4 divisors (see below), whose sum is σ = 3151800031806. Its totient is φ = 1050600010600.

The previous prime is 2101200021191. The next prime is 2101200021209. The reversal of 2101200021202 is 2021200021012.

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 only one way, i.e., 2085860951001 + 15339070201 = 1444251^2 + 123851^2 .

It is not an unprimeable number, because it can be changed into a prime (2101200021209) 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 as a sum of consecutive naturals, namely, 525300005299 + ... + 525300005302.

Almost surely, 2^{2101200021202} is an apocalyptic number.

2101200021202 is a deficient number, since it is larger than the sum of its proper divisors (1050600010604).

2101200021202 is a wasteful number, since it uses less digits than its factorization.

2101200021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050600010603.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2101200021202 its reverse (2021200021012), we get a palindrome (4122400042214).

The spelling of 2101200021202 in words is "two trillion, one hundred one billion, two hundred million, twenty-one thousand, two hundred two".