1010221020 has 36 divisors (see below), whose sum is σ = 3064337640. Its totient is φ = 269392224.

The previous prime is 1010221001. The next prime is 1010221021. The reversal of 1010221020 is 201220101.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 1010220993 and 1010221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010221021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2805990 + ... + 2806349.

It is an arithmetic number, because the mean of its divisors is an integer number (85120490).

Almost surely, 2^1010221020 is an apocalyptic number.

1010221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1010221020 is an abundant number, since it is smaller than the sum of its proper divisors (2054116620).

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

1010221020 is a wasteful number, since it uses less digits than its factorization.

1010221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612354 (or 5612349 counting only the distinct ones).

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

The square root of 1010221020 is about 31783.9742637701. The cubic root of 1010221020 is about 1003.3954644389.

Adding to 1010221020 its reverse (201220101), we get a palindrome (1211441121).

The spelling of 1010221020 in words is "one billion, ten million, two hundred twenty-one thousand, twenty".