220321121020 has 96 divisors (see below), whose sum is σ = 621213175296. Its totient is φ = 63389088000.

The previous prime is 220321121017. The next prime is 220321121023. The reversal of 220321121020 is 20121123022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220321121017) and next prime (220321121023).

It is a junction number, because it is equal to n+sod(n) for n = 220321120985 and 220321121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220321121023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5482506 + ... + 5522545.

It is an arithmetic number, because the mean of its divisors is an integer number (6470970576).

Almost surely, 2^220321121020 is an apocalyptic number.

220321121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220321121020 is an abundant number, since it is smaller than the sum of its proper divisors (400892054276).

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

220321121020 is a wasteful number, since it uses less digits than its factorization.

220321121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005091 (or 11005089 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 220321121020 its reverse (20121123022), we get a palindrome (240442244042).

The spelling of 220321121020 in words is "two hundred twenty billion, three hundred twenty-one million, one hundred twenty-one thousand, twenty".