220000121121220 has 48 divisors (see below), whose sum is σ = 515721214185408. Its totient is φ = 78139577900160.

The previous prime is 220000121121191. The next prime is 220000121121229. The reversal of 220000121121220 is 22121121000022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 220000121121194 and 220000121121203.

It is not an unprimeable number, because it can be changed into a prime (220000121121229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11627903919 + ... + 11627922838.

It is an arithmetic number, because the mean of its divisors is an integer number (10744191962196).

Almost surely, 2^{220000121121220} is an apocalyptic number.

220000121121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220000121121220 is an abundant number, since it is smaller than the sum of its proper divisors (295721093064188).

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

220000121121220 is a wasteful number, since it uses less digits than its factorization.

220000121121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23255826820 (or 23255826818 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220000121121220 its reverse (22121121000022), we get a palindrome (242121242121242).

The spelling of 220000121121220 in words is "two hundred twenty trillion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty".