1216215422046 has 24 divisors (see below), whose sum is σ = 2635268209704. Its totient is φ = 405384402960.

The previous prime is 1216215422017. The next prime is 1216215422047. The reversal of 1216215422046 is 6402245126121.

1216215422046 is a `hidden beast` number, since 1 + 2 + 1 + 621 + 5 + 4 + 2 + 20 + 4 + 6 = 666.

It is a super-2 number, since 2×1216215422046² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1216215422046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216215422047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1364416 + ... + 2072211.

It is an arithmetic number, because the mean of its divisors is an integer number (109802842071).

Almost surely, 2^{1216215422046} is an apocalyptic number.

1216215422046 is an abundant number, since it is smaller than the sum of its proper divisors (1419052787658).

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

1216215422046 is a wasteful number, since it uses less digits than its factorization.

1216215422046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456296 (or 3456293 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 1216215422046 in words is "one trillion, two hundred sixteen billion, two hundred fifteen million, four hundred twenty-two thousand, forty-six".