1020221120220 has 24 divisors (see below), whose sum is σ = 2856619136784. Its totient is φ = 272058965376.

The previous prime is 1020221120201. The next prime is 1020221120221. The reversal of 1020221120220 is 220211220201.

It is a super-2 number, since 2×1020221120220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1020221120220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020221120221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8501842609 + ... + 8501842728.

It is an arithmetic number, because the mean of its divisors is an integer number (119025797366).

Almost surely, 2^{1020221120220} is an apocalyptic number.

1020221120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020221120220 is an abundant number, since it is smaller than the sum of its proper divisors (1836398016564).

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

1020221120220 is a wasteful number, since it uses less digits than its factorization.

1020221120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17003685349 (or 17003685347 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1020221120220 its reverse (220211220201), we get a palindrome (1240432340421).

The spelling of 1020221120220 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty".