1020001002220 has 48 divisors (see below), whose sum is σ = 2228965643520. Its totient is φ = 391757558976.

The previous prime is 1020001002217. The next prime is 1020001002221. The reversal of 1020001002220 is 222001000201.

It is a super-3 number, since 3×1020001002220³ (a number of 37 digits) contains 333 as substring.

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 = 1020001002197 and 1020001002206.

It is not an unprimeable number, because it can be changed into a prime (1020001002221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10000512 + ... + 10101991.

It is an arithmetic number, because the mean of its divisors is an integer number (46436784240).

Almost surely, 2^{1020001002220} is an apocalyptic number.

1020001002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020001002220 is an abundant number, since it is smaller than the sum of its proper divisors (1208964641300).

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

1020001002220 is a wasteful number, since it uses less digits than its factorization.

1020001002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20102614 (or 20102612 counting only the distinct ones).

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

Adding to 1020001002220 its reverse (222001000201), we get a palindrome (1242002002421).

The spelling of 1020001002220 in words is "one trillion, twenty billion, one million, two thousand, two hundred twenty".