21112110220202 has 4 divisors (see below), whose sum is σ = 31668165330306. Its totient is φ = 10556055110100.

The previous prime is 21112110220193. The next prime is 21112110220273. The reversal of 21112110220202 is 20202201121112.

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., 19345579486321 + 1766530733881 = 4398361^2 + 1329109^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278027555049 + ... + 5278027555052.

Almost surely, 2^{21112110220202} is an apocalyptic number.

21112110220202 is a deficient number, since it is larger than the sum of its proper divisors (10556055110104).

21112110220202 is a wasteful number, since it uses less digits than its factorization.

21112110220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556055110103.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112110220202 its reverse (20202201121112), we get a palindrome (41314311341314).

The spelling of 21112110220202 in words is "twenty-one trillion, one hundred twelve billion, one hundred ten million, two hundred twenty thousand, two hundred two".