1021003232220 has 144 divisors (see below), whose sum is σ = 3311060276160. Its totient is φ = 253763831808.

The previous prime is 1021003232209. The next prime is 1021003232267. The reversal of 1021003232220 is 222323001201.

1021003232220 is a `hidden beast` number, since 1 + 0 + 210 + 0 + 3 + 232 + 220 = 666.

It is a super-2 number, since 2×1021003232220² (a number of 25 digits) contains 22 as substring.

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 = 1021003232193 and 1021003232202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1304535 + ... + 1934894.

It is an arithmetic number, because the mean of its divisors is an integer number (22993474140).

Almost surely, 2^{1021003232220} is an apocalyptic number.

1021003232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021003232220 is an abundant number, since it is smaller than the sum of its proper divisors (2290057043940).

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

1021003232220 is a wasteful number, since it uses less digits than its factorization.

1021003232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239564 (or 3239559 counting only the distinct ones).

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

Adding to 1021003232220 its reverse (222323001201), we get a palindrome (1243326233421).

The spelling of 1021003232220 in words is "one trillion, twenty-one billion, three million, two hundred thirty-two thousand, two hundred twenty".