1001020220 has 24 divisors (see below), whose sum is σ = 2151031344. Its totient is φ = 391095936.

The previous prime is 1001020213. The next prime is 1001020243. The reversal of 1001020220 is 220201001.

It is a junction number, because it is equal to n+sod(n) for n = 1001020198 and 1001020207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581129 + ... + 582848.

It is an arithmetic number, because the mean of its divisors is an integer number (89626306).

Almost surely, 2^1001020220 is an apocalyptic number.

1001020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001020220 is an abundant number, since it is smaller than the sum of its proper divisors (1150011124).

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

1001020220 is a wasteful number, since it uses less digits than its factorization.

1001020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164029 (or 1164027 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1001020220 is about 31638.9035840372. The cubic root of 1001020220 is about 1000.3399577490.

Adding to 1001020220 its reverse (220201001), we get a palindrome (1221221221).

The spelling of 1001020220 in words is "one billion, one million, twenty thousand, two hundred twenty".