1211921411416 has 16 divisors (see below), whose sum is σ = 2272381635600. Its totient is φ = 605952975264.

The previous prime is 1211921411411. The next prime is 1211921411419. The reversal of 1211921411416 is 6141141291121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211921411411) 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, 270556 + ... + 1580203.

It is an arithmetic number, because the mean of its divisors is an integer number (142023852225).

Almost surely, 2^{1211921411416} is an apocalyptic number.

It is an amenable number.

1211921411416 is a deficient number, since it is larger than the sum of its proper divisors (1060460224184).

1211921411416 is a wasteful number, since it uses less digits than its factorization.

1211921411416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932618 (or 1932614 counting only the distinct ones).

The product of its digits is 3456, while the sum is 34.

The spelling of 1211921411416 in words is "one trillion, two hundred eleven billion, nine hundred twenty-one million, four hundred eleven thousand, four hundred sixteen".