1020001220220 has 96 divisors (see below), whose sum is σ = 2985877827072. Its totient is φ = 259676575488.

The previous prime is 1020001220153. The next prime is 1020001220257. The reversal of 1020001220220 is 220221000201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1020001220196 and 1020001220205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15114 + ... + 1428366.

It is an arithmetic number, because the mean of its divisors is an integer number (31102894032).

Almost surely, 2^{1020001220220} is an apocalyptic number.

1020001220220 is a gapful number since it is divisible by the number (10) 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 1020001220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492938913536).

1020001220220 is an abundant number, since it is smaller than the sum of its proper divisors (1965876606852).

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

1020001220220 is a wasteful number, since it uses less digits than its factorization.

1020001220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413811 (or 1413809 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1020001220220 its reverse (220221000201), we get a palindrome (1240222220421).

The spelling of 1020001220220 in words is "one trillion, twenty billion, one million, two hundred twenty thousand, two hundred twenty".