1000122020 has 48 divisors (see below), whose sum is σ = 2156532336. Its totient is φ = 389376000.

The previous prime is 1000122017. The next prime is 1000122037. The reversal of 1000122020 is 202210001.

It can be written as a sum of positive squares in 8 ways, for example, as 141514816 + 858607204 = 11896^2 + 29302^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1000121989 and 1000122007.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426050 + ... + 428390.

It is an arithmetic number, because the mean of its divisors is an integer number (44927757).

Almost surely, 2^1000122020 is an apocalyptic number.

1000122020 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 1000122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1078266168).

1000122020 is an abundant number, since it is smaller than the sum of its proper divisors (1156410316).

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

1000122020 is a wasteful number, since it uses less digits than its factorization.

1000122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912 (or 2910 counting only the distinct ones).

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

The square root of 1000122020 is about 31624.7058484344. The cubic root of 1000122020 is about 1000.0406716791.

Adding to 1000122020 its reverse (202210001), we get a palindrome (1202332021).

The spelling of 1000122020 in words is "one billion, one hundred twenty-two thousand, twenty".