1201022220 has 48 divisors (see below), whose sum is σ = 3453756768. Its totient is φ = 311616000.

The previous prime is 1201022219. The next prime is 1201022233. The reversal of 1201022220 is 222201021.

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 = 1201022196 and 1201022205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268281 + ... + 272720.

It is an arithmetic number, because the mean of its divisors is an integer number (71953266).

Almost surely, 2^1201022220 is an apocalyptic number.

1201022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201022220 is an abundant number, since it is smaller than the sum of its proper divisors (2252734548).

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

1201022220 is a wasteful number, since it uses less digits than its factorization.

1201022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541050 (or 541048 counting only the distinct ones).

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

The square root of 1201022220 is about 34655.7674853696. The cubic root of 1201022220 is about 1062.9602254442.

Adding to 1201022220 its reverse (222201021), we get a palindrome (1423223241).

The spelling of 1201022220 in words is "one billion, two hundred one million, twenty-two thousand, two hundred twenty".