1213523450312 has 32 divisors (see below), whose sum is σ = 2450874862080. Its totient is φ = 561658817280.

The previous prime is 1213523450311. The next prime is 1213523450317. The reversal of 1213523450312 is 2130543253121.

It is a super-2 number, since 2×1213523450312² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213523450311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106369073 + ... + 106380480.

It is an arithmetic number, because the mean of its divisors is an integer number (76589839440).

Almost surely, 2^{1213523450312} is an apocalyptic number.

It is an amenable number.

1213523450312 is an abundant number, since it is smaller than the sum of its proper divisors (1237351411768).

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

1213523450312 is a wasteful number, since it uses less digits than its factorization.

1213523450312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212749613 (or 212749609 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 1213523450312 in words is "one trillion, two hundred thirteen billion, five hundred twenty-three million, four hundred fifty thousand, three hundred twelve".