1001323220220 has 36 divisors (see below), whose sum is σ = 3037347101880. Its totient is φ = 267019525344.

The previous prime is 1001323220207. The next prime is 1001323220251. The reversal of 1001323220220 is 220223231001.

1001323220220 is a `hidden beast` number, since 100 + 1 + 323 + 2 + 20 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1001323220193 and 1001323220202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2781453210 + ... + 2781453569.

It is an arithmetic number, because the mean of its divisors is an integer number (84370752830).

Almost surely, 2^{1001323220220} is an apocalyptic number.

1001323220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001323220220 is an abundant number, since it is smaller than the sum of its proper divisors (2036023881660).

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

1001323220220 is a wasteful number, since it uses less digits than its factorization.

1001323220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562906794 (or 5562906789 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1001323220220 its reverse (220223231001), we get a palindrome (1221546451221).

The spelling of 1001323220220 in words is "one trillion, one billion, three hundred twenty-three million, two hundred twenty thousand, two hundred twenty".