1212691355872 has 24 divisors (see below), whose sum is σ = 2393499950856. Its totient is φ = 604818352512.

The previous prime is 1212691355857. The next prime is 1212691355873. The reversal of 1212691355872 is 2785531962121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212691355873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47716018 + ... + 47741425.

It is an arithmetic number, because the mean of its divisors is an integer number (99729164619).

Almost surely, 2^{1212691355872} is an apocalyptic number.

It is an amenable number.

1212691355872 is a deficient number, since it is larger than the sum of its proper divisors (1180808594984).

1212691355872 is an equidigital number, since it uses as much as digits as its factorization.

1212691355872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95457850 (or 95457842 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The spelling of 1212691355872 in words is "one trillion, two hundred twelve billion, six hundred ninety-one million, three hundred fifty-five thousand, eight hundred seventy-two".