2221201020 has 48 divisors (see below), whose sum is σ = 6387460128. Its totient is φ = 576311040.

The previous prime is 2221201013. The next prime is 2221201027. The reversal of 2221201020 is 201021222.

It is an interprime number because it is at equal distance from previous prime (2221201013) and next prime (2221201027).

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 = 2221200987 and 2221201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221201027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498051 + ... + 502490.

It is an arithmetic number, because the mean of its divisors is an integer number (133072086).

Almost surely, 2^2221201020 is an apocalyptic number.

2221201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221201020 is an abundant number, since it is smaller than the sum of its proper divisors (4166259108).

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

2221201020 is a wasteful number, since it uses less digits than its factorization.

2221201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000590 (or 1000588 counting only the distinct ones).

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

The square root of 2221201020 is about 47129.6193491948. The cubic root of 2221201020 is about 1304.7559561853.

Adding to 2221201020 its reverse (201021222), we get a palindrome (2422222242).

The spelling of 2221201020 in words is "two billion, two hundred twenty-one million, two hundred one thousand, twenty".