1216474298971 has 4 divisors (see below), whose sum is σ = 1242356730912. Its totient is φ = 1190591867032.

The previous prime is 1216474298969. The next prime is 1216474298983. The reversal of 1216474298971 is 1798924746121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216474298971 - 2¹ = 1216474298969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216474298911) 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, 12941215900 + ... + 12941215993.

It is an arithmetic number, because the mean of its divisors is an integer number (310589182728).

Almost surely, 2^{1216474298971} is an apocalyptic number.

1216474298971 is a deficient number, since it is larger than the sum of its proper divisors (25882431941).

1216474298971 is an equidigital number, since it uses as much as digits as its factorization.

1216474298971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25882431940.

The product of its digits is 12192768, while the sum is 61.

The spelling of 1216474298971 in words is "one trillion, two hundred sixteen billion, four hundred seventy-four million, two hundred ninety-eight thousand, nine hundred seventy-one".