1211716842672 has 80 divisors (see below), whose sum is σ = 3674137594112. Its totient is φ = 336847921920.

The previous prime is 1211716842671. The next prime is 1211716842683. The reversal of 1211716842672 is 2762486171121.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1211716842671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48721354 + ... + 48746217.

Almost surely, 2^{1211716842672} is an apocalyptic number.

1211716842672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211716842672 is an abundant number, since it is smaller than the sum of its proper divisors (2462420751440).

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

1211716842672 is a wasteful number, since it uses less digits than its factorization.

1211716842672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97467626 (or 97467620 counting only the distinct ones).

The product of its digits is 451584, while the sum is 48.

The spelling of 1211716842672 in words is "one trillion, two hundred eleven billion, seven hundred sixteen million, eight hundred forty-two thousand, six hundred seventy-two".