21111200212202 has 4 divisors (see below), whose sum is σ = 31666800318306. Its totient is φ = 10555600106100.

The previous prime is 21111200212133. The next prime is 21111200212211. The reversal of 21111200212202 is 20221200211112.

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., 11185606671121 + 9925593541081 = 3344489^2 + 3150491^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277800053049 + ... + 5277800053052.

Almost surely, 2^{21111200212202} is an apocalyptic number.

21111200212202 is a deficient number, since it is larger than the sum of its proper divisors (10555600106104).

21111200212202 is a wasteful number, since it uses less digits than its factorization.

21111200212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555600106103.

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

Adding to 21111200212202 its reverse (20221200211112), we get a palindrome (41332400423314).

The spelling of 21111200212202 in words is "twenty-one trillion, one hundred eleven billion, two hundred million, two hundred twelve thousand, two hundred two".