1213220132 has 6 divisors (see below), whose sum is σ = 2123135238. Its totient is φ = 606610064.

The previous prime is 1213220131. The next prime is 1213220149. The reversal of 1213220132 is 2310223121.

It can be written as a sum of positive squares in only one way, i.e., 1014804736 + 198415396 = 31856^2 + 14086^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1213220132.

It is not an unprimeable number, because it can be changed into a prime (1213220131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151652513 + ... + 151652520.

It is an arithmetic number, because the mean of its divisors is an integer number (353855873).

Almost surely, 2^1213220132 is an apocalyptic number.

It is an amenable number.

1213220132 is a deficient number, since it is larger than the sum of its proper divisors (909915106).

1213220132 is a wasteful number, since it uses less digits than its factorization.

1213220132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303305037 (or 303305035 counting only the distinct ones).

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

The square root of 1213220132 is about 34831.3096509448. The cubic root of 1213220132 is about 1066.5466831622.

Adding to 1213220132 its reverse (2310223121), we get a palindrome (3523443253).

The spelling of 1213220132 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, one hundred thirty-two".