2101212100202 has 4 divisors (see below), whose sum is σ = 3151818150306. Its totient is φ = 1050606050100.

The previous prime is 2101212100193. The next prime is 2101212100259. The reversal of 2101212100202 is 2020012121012.

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., 1997193594841 + 104018505361 = 1413221^2 + 322519^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525303025049 + ... + 525303025052.

Almost surely, 2^{2101212100202} is an apocalyptic number.

2101212100202 is a deficient number, since it is larger than the sum of its proper divisors (1050606050104).

2101212100202 is a wasteful number, since it uses less digits than its factorization.

2101212100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050606050103.

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

Adding to 2101212100202 its reverse (2020012121012), we get a palindrome (4121224221214).

The spelling of 2101212100202 in words is "two trillion, one hundred one billion, two hundred twelve million, one hundred thousand, two hundred two".