2101211100202 has 4 divisors (see below), whose sum is σ = 3151816650306. Its totient is φ = 1050605550100.

The previous prime is 2101211100137. The next prime is 2101211100227. The reversal of 2101211100202 is 2020011121012.

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., 1225734622641 + 875476477561 = 1107129^2 + 935669^2 .

It is a super-2 number, since 2×2101211100202² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525302775049 + ... + 525302775052.

Almost surely, 2^{2101211100202} is an apocalyptic number.

2101211100202 is a deficient number, since it is larger than the sum of its proper divisors (1050605550104).

2101211100202 is a wasteful number, since it uses less digits than its factorization.

2101211100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050605550103.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101211100202 its reverse (2020011121012), we get a palindrome (4121222221214).

The spelling of 2101211100202 in words is "two trillion, one hundred one billion, two hundred eleven million, one hundred thousand, two hundred two".