1201020220 has 12 divisors (see below), whose sum is σ = 2522142504. Its totient is φ = 480408080.

The previous prime is 1201020211. The next prime is 1201020253. The reversal of 1201020220 is 220201021.

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 = 1201020197 and 1201020206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30025486 + ... + 30025525.

It is an arithmetic number, because the mean of its divisors is an integer number (210178542).

Almost surely, 2^1201020220 is an apocalyptic number.

1201020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201020220 is an abundant number, since it is smaller than the sum of its proper divisors (1321122284).

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

1201020220 is a wasteful number, since it uses less digits than its factorization.

1201020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60051020 (or 60051018 counting only the distinct ones).

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

The square root of 1201020220 is about 34655.7386301317. The cubic root of 1201020220 is about 1062.9596354131.

Adding to 1201020220 its reverse (220201021), we get a palindrome (1421221241).

The spelling of 1201020220 in words is "one billion, two hundred one million, twenty thousand, two hundred twenty".