201212020 has 12 divisors (see below), whose sum is σ = 422545284. Its totient is φ = 80484800.

The previous prime is 201211999. The next prime is 201212021. The reversal of 201212020 is 20212102.

It can be written as a sum of positive squares in 2 ways, for example, as 140090896 + 61121124 = 11836^2 + 7818^2 .

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 = 201211988 and 201212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5030281 + ... + 5030320.

It is an arithmetic number, because the mean of its divisors is an integer number (35212107).

Almost surely, 2^201212020 is an apocalyptic number.

201212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212020 is an abundant number, since it is smaller than the sum of its proper divisors (221333264).

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

201212020 is a wasteful number, since it uses less digits than its factorization.

201212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060610 (or 10060608 counting only the distinct ones).

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

The square root of 201212020 is about 14184.9222768403. The cubic root of 201212020 is about 585.9824919928.

Adding to 201212020 its reverse (20212102), we get a palindrome (221424122).

The spelling of 201212020 in words is "two hundred one million, two hundred twelve thousand, twenty".