20002201201220 has 72 divisors (see below), whose sum is σ = 51736786007256. Its totient is φ = 6454491810816.

The previous prime is 20002201201189. The next prime is 20002201201223. The reversal of 20002201201220 is 2210210220002.

It can be written as a sum of positive squares in 4 ways, for example, as 1890691000576 + 18111510200644 = 1375024^2 + 4255762^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20002201201195 and 20002201201204.

It is not an unprimeable number, because it can be changed into a prime (20002201201223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 600289499 + ... + 600322818.

It is an arithmetic number, because the mean of its divisors is an integer number (718566472323).

Almost surely, 2^{20002201201220} is an apocalyptic number.

20002201201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002201201220 is an abundant number, since it is smaller than the sum of its proper divisors (31734584806036).

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

20002201201220 is a wasteful number, since it uses less digits than its factorization.

20002201201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200612357 (or 1200612348 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20002201201220 its reverse (2210210220002), we get a palindrome (22212411421222).

The spelling of 20002201201220 in words is "twenty trillion, two billion, two hundred one million, two hundred one thousand, two hundred twenty".