1222200020 has 24 divisors (see below), whose sum is σ = 2581463304. Its totient is φ = 486052736.

The previous prime is 1222200011. The next prime is 1222200029. The reversal of 1222200020 is 200022221.

It is an interprime number because it is at equal distance from previous prime (1222200011) and next prime (1222200029).

It can be written as a sum of positive squares in 4 ways, for example, as 233600656 + 988599364 = 15284^2 + 31442^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1222199974 and 1222200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222200029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173159 + ... + 180078.

It is an arithmetic number, because the mean of its divisors is an integer number (107560971).

Almost surely, 2^1222200020 is an apocalyptic number.

1222200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222200020 is an abundant number, since it is smaller than the sum of its proper divisors (1359263284).

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

1222200020 is a wasteful number, since it uses less digits than its factorization.

1222200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353419 (or 353417 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1222200020 is about 34959.9774027387. The cubic root of 1222200020 is about 1069.1716359240.

Adding to 1222200020 its reverse (200022221), we get a palindrome (1422222241).

The spelling of 1222200020 in words is "one billion, two hundred twenty-two million, two hundred thousand, twenty".