20121220202210 has 32 divisors (see below), whose sum is σ = 38206054261440. Its totient is φ = 7608556037952.

The previous prime is 20121220202173. The next prime is 20121220202219. The reversal of 20121220202210 is 1220202212102.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20121220202219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113295809 + ... + 113473268.

It is an arithmetic number, because the mean of its divisors is an integer number (1193939195670).

Almost surely, 2^{20121220202210} is an apocalyptic number.

20121220202210 is a deficient number, since it is larger than the sum of its proper divisors (18084834059230).

20121220202210 is a wasteful number, since it uses less digits than its factorization.

20121220202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226769570.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20121220202210 its reverse (1220202212102), we get a palindrome (21341422414312).

The spelling of 20121220202210 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, two hundred two thousand, two hundred ten".