2121212010202 has 4 divisors (see below), whose sum is σ = 3181818015306. Its totient is φ = 1060606005100.

The previous prime is 2121212010167. The next prime is 2121212010223. The reversal of 2121212010202 is 2020102121212.

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., 2120020448841 + 1191561361 = 1456029^2 + 34519^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530303002549 + ... + 530303002552.

Almost surely, 2^{2121212010202} is an apocalyptic number.

2121212010202 is a deficient number, since it is larger than the sum of its proper divisors (1060606005104).

2121212010202 is a wasteful number, since it uses less digits than its factorization.

2121212010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060606005103.

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

Adding to 2121212010202 its reverse (2020102121212), we get a palindrome (4141314131414).

The spelling of 2121212010202 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, ten thousand, two hundred two".