2101212120202 has 32 divisors (see below), whose sum is σ = 3465878007312. Its totient is φ = 949523503104.

The previous prime is 2101212120199. The next prime is 2101212120211. The reversal of 2101212120202 is 2020212121012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 450524206521 + 1650687913681 = 671211^2 + 1284791^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3780363 + ... + 4300414.

Almost surely, 2^{2101212120202} is an apocalyptic number.

2101212120202 is a deficient number, since it is larger than the sum of its proper divisors (1364665887110).

2101212120202 is a wasteful number, since it uses less digits than its factorization.

2101212120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081002.

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

Adding to 2101212120202 its reverse (2020212121012), we get a palindrome (4121424241214).

The spelling of 2101212120202 in words is "two trillion, one hundred one billion, two hundred twelve million, one hundred twenty thousand, two hundred two".