1201022020 has 96 divisors (see below), whose sum is σ = 2879525376. Its totient is φ = 416870400.

The previous prime is 1201021963. The next prime is 1201022041. The reversal of 1201022020 is 202201021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1201021988 and 1201022006.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422524 + ... + 425356.

It is an arithmetic number, because the mean of its divisors is an integer number (29995056).

Almost surely, 2^1201022020 is an apocalyptic number.

1201022020 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 1201022020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439762688).

1201022020 is an abundant number, since it is smaller than the sum of its proper divisors (1678503356).

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

1201022020 is a wasteful number, since it uses less digits than its factorization.

1201022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941 (or 2939 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1201022020 is about 34655.7645998469. The cubic root of 1201022020 is about 1062.9601664412.

Adding to 1201022020 its reverse (202201021), we get a palindrome (1403223041).

The spelling of 1201022020 in words is "one billion, two hundred one million, twenty-two thousand, twenty".