20120201100220 has 36 divisors (see below), whose sum is σ = 45752622982920. Its totient is φ = 7428997328064.

The previous prime is 20120201100157. The next prime is 20120201100221. The reversal of 20120201100220 is 2200110202102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 20120201100220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120201100221) 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 11 ways as a sum of consecutive naturals, for example, 2976357730 + ... + 2976364489.

It is an arithmetic number, because the mean of its divisors is an integer number (1270906193970).

Almost surely, 2^{20120201100220} is an apocalyptic number.

20120201100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120201100220 is an abundant number, since it is smaller than the sum of its proper divisors (25632421882700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20120201100220 is a wasteful number, since it uses less digits than its factorization.

20120201100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952722254 (or 5952722239 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20120201100220 its reverse (2200110202102), we get a palindrome (22320311302322).

The spelling of 20120201100220 in words is "twenty trillion, one hundred twenty billion, two hundred one million, one hundred thousand, two hundred twenty".