10200121220 has 12 divisors (see below), whose sum is σ = 21420254604. Its totient is φ = 4080048480.

The previous prime is 10200121207. The next prime is 10200121223. The reversal of 10200121220 is 2212100201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4432630084 + 5767491136 = 66578^2 + 75944^2 .

It is not an unprimeable number, because it can be changed into a prime (10200121223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255003011 + ... + 255003050.

It is an arithmetic number, because the mean of its divisors is an integer number (1785021217).

Almost surely, 2^10200121220 is an apocalyptic number.

10200121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10200121220 is an abundant number, since it is smaller than the sum of its proper divisors (11220133384).

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

10200121220 is a wasteful number, since it uses less digits than its factorization.

10200121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510006070 (or 510006068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10200121220 its reverse (2212100201), we get a palindrome (12412221421).

The spelling of 10200121220 in words is "ten billion, two hundred million, one hundred twenty-one thousand, two hundred twenty".