1216042433452 has 24 divisors (see below), whose sum is σ = 2653183491840. Its totient is φ = 473782766160.

The previous prime is 1216042433383. The next prime is 1216042433513. The reversal of 1216042433452 is 2543342406121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1974094552 + ... + 1974095167.

It is an arithmetic number, because the mean of its divisors is an integer number (110549312160).

Almost surely, 2^{1216042433452} is an apocalyptic number.

It is an amenable number.

1216042433452 is an abundant number, since it is smaller than the sum of its proper divisors (1437141058388).

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

1216042433452 is a wasteful number, since it uses less digits than its factorization.

1216042433452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948189741 (or 3948189739 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 1216042433452 its reverse (2543342406121), we get a palindrome (3759384839573).

The spelling of 1216042433452 in words is "one trillion, two hundred sixteen billion, forty-two million, four hundred thirty-three thousand, four hundred fifty-two".