1212135052520 has 32 divisors (see below), whose sum is σ = 3116918707200. Its totient is φ = 415589160768.

The previous prime is 1212135052519. The next prime is 1212135052561. The reversal of 1212135052520 is 252505312121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2164526600 + ... + 2164527159.

It is an arithmetic number, because the mean of its divisors is an integer number (97403709600).

Almost surely, 2^{1212135052520} is an apocalyptic number.

1212135052520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212135052520 is an abundant number, since it is smaller than the sum of its proper divisors (1904783654680).

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

1212135052520 is a wasteful number, since it uses less digits than its factorization.

1212135052520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329053777 (or 4329053773 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 1212135052520 in words is "one trillion, two hundred twelve billion, one hundred thirty-five million, fifty-two thousand, five hundred twenty".