1212450206520 has 128 divisors (see below), whose sum is σ = 4174221680640. Its totient is φ = 275981506560.

The previous prime is 1212450206503. The next prime is 1212450206521. The reversal of 1212450206520 is 256020542121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212450206521) 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, 2792152 + ... + 3197031.

It is an arithmetic number, because the mean of its divisors is an integer number (32611106880).

Almost surely, 2^{1212450206520} is an apocalyptic number.

1212450206520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212450206520 is an abundant number, since it is smaller than the sum of its proper divisors (2961771474120).

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

1212450206520 is a wasteful number, since it uses less digits than its factorization.

1212450206520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989445 (or 5989441 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1212450206520 its reverse (256020542121), we get a palindrome (1468470748641).

The spelling of 1212450206520 in words is "one trillion, two hundred twelve billion, four hundred fifty million, two hundred six thousand, five hundred twenty".