1212920524128 has 48 divisors (see below), whose sum is σ = 3184014488256. Its totient is φ = 404294382720.

The previous prime is 1212920524121. The next prime is 1212920524163. The reversal of 1212920524128 is 8214250292121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212920524121) 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, 3253375 + ... + 3606977.

It is an arithmetic number, because the mean of its divisors is an integer number (66333635172).

Almost surely, 2^{1212920524128} is an apocalyptic number.

It is an amenable number.

1212920524128 is an abundant number, since it is smaller than the sum of its proper divisors (1971093964128).

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

1212920524128 is a wasteful number, since it uses less digits than its factorization.

1212920524128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389347 (or 389339 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 1212920524128 in words is "one trillion, two hundred twelve billion, nine hundred twenty million, five hundred twenty-four thousand, one hundred twenty-eight".