1021002020220 has 384 divisors, whose sum is σ = 3541267537920. Its totient is φ = 214032752640.

The previous prime is 1021002020191. The next prime is 1021002020249. The reversal of 1021002020220 is 220202001201.

It is an interprime number because it is at equal distance from previous prime (1021002020191) and next prime (1021002020249).

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 = 1021002020196 and 1021002020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1071355264 + ... + 1071356216.

It is an arithmetic number, because the mean of its divisors is an integer number (9222050880).

Almost surely, 2^{1021002020220} is an apocalyptic number.

1021002020220 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 1021002020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1770633768960).

1021002020220 is an abundant number, since it is smaller than the sum of its proper divisors (2520265517700).

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

1021002020220 is a wasteful number, since it uses less digits than its factorization.

1021002020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045 (or 2043 counting only the distinct ones).

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

Adding to 1021002020220 its reverse (220202001201), we get a palindrome (1241204021421).

The spelling of 1021002020220 in words is "one trillion, twenty-one billion, two million, twenty thousand, two hundred twenty".