200012121220 has 24 divisors (see below), whose sum is σ = 430269979608. Its totient is φ = 78053510400.

The previous prime is 200012121203. The next prime is 200012121223. The reversal of 200012121220 is 22121210002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6250167364 + 193761953856 = 79058^2 + 440184^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 200012121220.

It is not an unprimeable number, because it can be changed into a prime (200012121223) 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, 121957791 + ... + 121959430.

It is an arithmetic number, because the mean of its divisors is an integer number (17927915817).

Almost surely, 2^200012121220 is an apocalyptic number.

200012121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200012121220 is an abundant number, since it is smaller than the sum of its proper divisors (230257858388).

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

200012121220 is a wasteful number, since it uses less digits than its factorization.

200012121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243917271 (or 243917269 counting only the distinct ones).

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

Adding to 200012121220 its reverse (22121210002), we get a palindrome (222133331222).

The spelling of 200012121220 in words is "two hundred billion, twelve million, one hundred twenty-one thousand, two hundred twenty".