1211497784012 has 12 divisors (see below), whose sum is σ = 2165230082400. Its totient is φ = 592860617616.

The previous prime is 1211497783943. The next prime is 1211497784017. The reversal of 1211497784012 is 2104877941121.

It is a super-2 number, since 2×1211497784012² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (1211497784017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3222068387 + ... + 3222068762.

It is an arithmetic number, because the mean of its divisors is an integer number (180435840200).

Almost surely, 2^{1211497784012} is an apocalyptic number.

It is an amenable number.

1211497784012 is a deficient number, since it is larger than the sum of its proper divisors (953732298388).

1211497784012 is a wasteful number, since it uses less digits than its factorization.

1211497784012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444137200 (or 6444137198 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 1211497784012 in words is "one trillion, two hundred eleven billion, four hundred ninety-seven million, seven hundred eighty-four thousand, twelve".