20203121102220 has 288 divisors, whose sum is σ = 72447899596800. Its totient is φ = 4460723799552.

The previous prime is 20203121102207. The next prime is 20203121102287. The reversal of 20203121102220 is 2220112130202.

20203121102220 is a `hidden beast` number, since 2 + 0 + 20 + 312 + 110 + 2 + 220 = 666.

It is a super-2 number, since 2×20203121102220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20203121102193 and 20203121102202.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4921341 + ... + 8039019.

Almost surely, 2^{20203121102220} is an apocalyptic number.

20203121102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203121102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36223949798400).

20203121102220 is an abundant number, since it is smaller than the sum of its proper divisors (52244778494580).

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

20203121102220 is a wasteful number, since it uses less digits than its factorization.

20203121102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117877 (or 3117872 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20203121102220 its reverse (2220112130202), we get a palindrome (22423233232422).

The spelling of 20203121102220 in words is "twenty trillion, two hundred three billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty".