20012221122010 has 64 divisors (see below), whose sum is σ = 39611372304672. Its totient is φ = 7234709999616.

The previous prime is 20012221122001. The next prime is 20012221122017. The reversal of 20012221122010 is 1022112221002.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 753578511921 + 19258642610089 = 868089^2 + 4388467^2 .

It is not an unprimeable number, because it can be changed into a prime (20012221122017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6396109 + ... + 8996368.

Almost surely, 2^{20012221122010} is an apocalyptic number.

20012221122010 is a deficient number, since it is larger than the sum of its proper divisors (19599151182662).

20012221122010 is a wasteful number, since it uses less digits than its factorization.

20012221122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15392707.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20012221122010 its reverse (1022112221002), we get a palindrome (21034333343012).

The spelling of 20012221122010 in words is "twenty trillion, twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, ten".