1212788012720 has 20 divisors (see below), whose sum is σ = 2819732129760. Its totient is φ = 485115205056.

The previous prime is 1212788012701. The next prime is 1212788012743. The reversal of 1212788012720 is 272108872121.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7579925000 + ... + 7579925159.

It is an arithmetic number, because the mean of its divisors is an integer number (140986606488).

Almost surely, 2^{1212788012720} is an apocalyptic number.

1212788012720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212788012720 is an abundant number, since it is smaller than the sum of its proper divisors (1606944117040).

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

1212788012720 is a wasteful number, since it uses less digits than its factorization.

1212788012720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15159850172 (or 15159850166 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 41.

The spelling of 1212788012720 in words is "one trillion, two hundred twelve billion, seven hundred eighty-eight million, twelve thousand, seven hundred twenty".