1213322120 has 32 divisors (see below), whose sum is σ = 2737027800. Its totient is φ = 484075008.

The previous prime is 1213322101. The next prime is 1213322153. The reversal of 1213322120 is 212233121.

It can be written as a sum of positive squares in 4 ways, for example, as 890544964 + 322777156 = 29842^2 + 17966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23429 + ... + 54548.

Almost surely, 2^1213322120 is an apocalyptic number.

1213322120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213322120 is an abundant number, since it is smaller than the sum of its proper divisors (1523705680).

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

1213322120 is a wasteful number, since it uses less digits than its factorization.

1213322120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78377 (or 78373 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1213322120 is about 34832.7736478162. The cubic root of 1213322120 is about 1066.5765683447.

Adding to 1213322120 its reverse (212233121), we get a palindrome (1425555241).

The spelling of 1213322120 in words is "one billion, two hundred thirteen million, three hundred twenty-two thousand, one hundred twenty".