1212541320 has 128 divisors (see below), whose sum is σ = 3869648640. Its totient is φ = 302899200.

The previous prime is 1212541279. The next prime is 1212541321. The reversal of 1212541320 is 231452121.

It is not an unprimeable number, because it can be changed into a prime (1212541321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474045 + ... + 476595.

It is an arithmetic number, because the mean of its divisors is an integer number (30231630).

Almost surely, 2^1212541320 is an apocalyptic number.

1212541320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212541320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934824320).

1212541320 is an abundant number, since it is smaller than the sum of its proper divisors (2657107320).

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

1212541320 is a wasteful number, since it uses less digits than its factorization.

1212541320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1212541320 is about 34821.5640085278. The cubic root of 1212541320 is about 1066.3477306017.

Adding to 1212541320 its reverse (231452121), we get a palindrome (1443993441).

The spelling of 1212541320 in words is "one billion, two hundred twelve million, five hundred forty-one thousand, three hundred twenty".