220120121221220 has 192 divisors, whose sum is σ = 530538706317312. Its totient is φ = 75993821568000.

The previous prime is 220120121221199. The next prime is 220120121221249. The reversal of 220120121221220 is 22122121021022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 220120121221192 and 220120121221201.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 104062967 + ... + 106157153.

It is an arithmetic number, because the mean of its divisors is an integer number (2763222428736).

Almost surely, 2^{220120121221220} is an apocalyptic number.

220120121221220 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 220120121221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265269353158656).

220120121221220 is an abundant number, since it is smaller than the sum of its proper divisors (310418585096092).

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

220120121221220 is a wasteful number, since it uses less digits than its factorization.

220120121221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094562 (or 2094560 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 220120121221220 its reverse (22122121021022), we get a palindrome (242242242242242).

It can be divided in two parts, 22012012 and 1221220, that added together give a palindrome (23233232).

The spelling of 220120121221220 in words is "two hundred twenty trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty".