1212221523504 has 40 divisors (see below), whose sum is σ = 3296391864640. Its totient is φ = 382806796608.

The previous prime is 1212221523493. The next prime is 1212221523511. The reversal of 1212221523504 is 4053251222121.

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, 664594222 + ... + 664596045.

It is an arithmetic number, because the mean of its divisors is an integer number (82409796616).

Almost surely, 2^{1212221523504} is an apocalyptic number.

It is an amenable number.

1212221523504 is an abundant number, since it is smaller than the sum of its proper divisors (2084170341136).

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

1212221523504 is a wasteful number, since it uses less digits than its factorization.

1212221523504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329190297 (or 1329190291 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1212221523504 its reverse (4053251222121), we get a palindrome (5265472745625).

The spelling of 1212221523504 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, five hundred twenty-three thousand, five hundred four".