21112221111202 has 8 divisors (see below), whose sum is σ = 34104357179676. Its totient is φ = 9744102051312.

The previous prime is 21112221111101. The next prime is 21112221111221. The reversal of 21112221111202 is 20211112221112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19878231167001 + 1233989944201 = 4458501^2 + 1110851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21112221111202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406004252113 + ... + 406004252164.

Almost surely, 2^{21112221111202} is an apocalyptic number.

21112221111202 is a deficient number, since it is larger than the sum of its proper divisors (12992136068474).

21112221111202 is a wasteful number, since it uses less digits than its factorization.

21112221111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812008504292.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21112221111202 its reverse (20211112221112), we get a palindrome (41323333332314).

The spelling of 21112221111202 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred eleven thousand, two hundred two".