1021002000220 has 24 divisors (see below), whose sum is σ = 2256951790800. Its totient is φ = 386906020992.

The previous prime is 1021002000217. The next prime is 1021002000223. The reversal of 1021002000220 is 220002001201.

It is an interprime number because it is at equal distance from previous prime (1021002000217) and next prime (1021002000223).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1021002000197 and 1021002000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021002000223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1343423305 + ... + 1343424064.

It is an arithmetic number, because the mean of its divisors is an integer number (94039657950).

Almost surely, 2^{1021002000220} is an apocalyptic number.

1021002000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021002000220 is an abundant number, since it is smaller than the sum of its proper divisors (1235949790580).

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

1021002000220 is a wasteful number, since it uses less digits than its factorization.

1021002000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686847397 (or 2686847395 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1021002000220 its reverse (220002001201), we get a palindrome (1241004001421).

The spelling of 1021002000220 in words is "one trillion, twenty-one billion, two million, two hundred twenty", and thus it is an aban number.