1213206980 has 24 divisors (see below), whose sum is σ = 2553427800. Its totient is φ = 484198400.

The previous prime is 1213206959. The next prime is 1213206983. The reversal of 1213206980 is 896023121.

It can be written as a sum of positive squares in 4 ways, for example, as 2027776 + 1211179204 = 1424^2 + 34802^2 .

It is not an unprimeable number, because it can be changed into a prime (1213206983) 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, 58571 + ... + 76530.

It is an arithmetic number, because the mean of its divisors is an integer number (106392825).

Almost surely, 2^1213206980 is an apocalyptic number.

1213206980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213206980 is an abundant number, since it is smaller than the sum of its proper divisors (1340220820).

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

1213206980 is a wasteful number, since it uses less digits than its factorization.

1213206980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135559 (or 135557 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1213206980 is about 34831.1208547758. The cubic root of 1213206980 is about 1066.5428291563.

The spelling of 1213206980 in words is "one billion, two hundred thirteen million, two hundred six thousand, nine hundred eighty".