1020022220 has 144 divisors (see below), whose sum is σ = 2714796000. Its totient is φ = 319721472.

The previous prime is 1020022189. The next prime is 1020022261. The reversal of 1020022220 is 222200201.

It is a congruent number.

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, 539036 + ... + 540924.

It is an arithmetic number, because the mean of its divisors is an integer number (18852750).

Almost surely, 2^1020022220 is an apocalyptic number.

1020022220 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 1020022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357398000).

1020022220 is an abundant number, since it is smaller than the sum of its proper divisors (1694773780).

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

1020022220 is a wasteful number, since it uses less digits than its factorization.

1020022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1951 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1020022220 is about 31937.7867110418. The cubic root of 1020022220 is about 1006.6300190353.

Adding to 1020022220 its reverse (222200201), we get a palindrome (1242222421).

The spelling of 1020022220 in words is "one billion, twenty million, twenty-two thousand, two hundred twenty".