1308122181912 has 128 divisors (see below), whose sum is σ = 4080128693760. Its totient is φ = 340273198080.

The previous prime is 1308122181889. The next prime is 1308122181917. The reversal of 1308122181912 is 2191812218031.

It is a super-2 number, since 2×1308122181912² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308122181917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3943014 + ... + 4261877.

It is an arithmetic number, because the mean of its divisors is an integer number (31876005420).

Almost surely, 2^{1308122181912} is an apocalyptic number.

1308122181912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1308122181912 is an abundant number, since it is smaller than the sum of its proper divisors (2772006511848).

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

1308122181912 is a wasteful number, since it uses less digits than its factorization.

1308122181912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8204993 (or 8204989 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 39.

Adding to 1308122181912 its reverse (2191812218031), we get a palindrome (3499934399943).

The spelling of 1308122181912 in words is "one trillion, three hundred eight billion, one hundred twenty-two million, one hundred eighty-one thousand, nine hundred twelve".