1020122220 has 192 divisors, whose sum is σ = 3247340544. Its totient is φ = 237388800.

The previous prime is 1020122219. The next prime is 1020122261. The reversal of 1020122220 is 222210201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1020122196 and 1020122205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1811659 + ... + 1812221.

It is an arithmetic number, because the mean of its divisors is an integer number (16913232).

Almost surely, 2^1020122220 is an apocalyptic number.

1020122220 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 1020122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1623670272).

1020122220 is an abundant number, since it is smaller than the sum of its proper divisors (2227218324).

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

1020122220 is a wasteful number, since it uses less digits than its factorization.

1020122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1020122220 is about 31939.3522163490. The cubic root of 1020122220 is about 1006.6629136496.

Adding to 1020122220 its reverse (222210201), we get a palindrome (1242332421).

The spelling of 1020122220 in words is "one billion, twenty million, one hundred twenty-two thousand, two hundred twenty".