20112221102210 has 16 divisors (see below), whose sum is σ = 36218297887992. Its totient is φ = 8041266240000.

The previous prime is 20112221102203. The next prime is 20112221102213. The reversal of 20112221102210 is 1220112221102.

It can be written as a sum of positive squares in 4 ways, for example, as 19844022443569 + 268198658641 = 4454663^2 + 517879^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20112221102213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452751791 + ... + 452796210.

Almost surely, 2^{20112221102210} is an apocalyptic number.

20112221102210 is a deficient number, since it is larger than the sum of its proper divisors (16106076785782).

20112221102210 is a wasteful number, since it uses less digits than its factorization.

20112221102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905550229.

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

Adding to 20112221102210 its reverse (1220112221102), we get a palindrome (21332333323312).

The spelling of 20112221102210 in words is "twenty trillion, one hundred twelve billion, two hundred twenty-one million, one hundred two thousand, two hundred ten".