1226013220 has 12 divisors (see below), whose sum is σ = 2574627804. Its totient is φ = 490405280.

The previous prime is 1226013211. The next prime is 1226013233. The reversal of 1226013220 is 223106221.

It can be written as a sum of positive squares in 2 ways, for example, as 787026916 + 438986304 = 28054^2 + 20952^2 .

It is a super-2 number, since 2×1226013220² = 3006216831229536800, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 30650311 + ... + 30650350.

It is an arithmetic number, because the mean of its divisors is an integer number (214552317).

Almost surely, 2^1226013220 is an apocalyptic number.

1226013220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226013220 is an abundant number, since it is smaller than the sum of its proper divisors (1348614584).

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

1226013220 is a wasteful number, since it uses less digits than its factorization.

1226013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61300670 (or 61300668 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1226013220 is about 35014.4715796198. The cubic root of 1226013220 is about 1070.2824013679.

Adding to 1226013220 its reverse (223106221), we get a palindrome (1449119441).

The spelling of 1226013220 in words is "one billion, two hundred twenty-six million, thirteen thousand, two hundred twenty".