1021010220 has 144 divisors (see below), whose sum is σ = 3302208000. Its totient is φ = 254606976.

The previous prime is 1021010197. The next prime is 1021010231. The reversal of 1021010220 is 220101201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 268291 + ... + 272069.

It is an arithmetic number, because the mean of its divisors is an integer number (22932000).

Almost surely, 2^1021010220 is an apocalyptic number.

1021010220 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 1021010220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651104000).

1021010220 is an abundant number, since it is smaller than the sum of its proper divisors (2281197780).

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

1021010220 is a wasteful number, since it uses less digits than its factorization.

1021010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021010220 is about 31953.2505388732. The cubic root of 1021010220 is about 1006.9549235661.

Adding to 1021010220 its reverse (220101201), we get a palindrome (1241111421).

The spelling of 1021010220 in words is "one billion, twenty-one million, ten thousand, two hundred twenty".