1312023121212 has 24 divisors (see below), whose sum is σ = 3136055266512. Its totient is φ = 426674185600.

The previous prime is 1312023121141. The next prime is 1312023121267. The reversal of 1312023121212 is 2121213202131.

It is a congruent number.

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, 1333356339 + ... + 1333357322.

It is an arithmetic number, because the mean of its divisors is an integer number (130668969438).

Almost surely, 2^{1312023121212} is an apocalyptic number.

1312023121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312023121212 is an abundant number, since it is smaller than the sum of its proper divisors (1824032145300).

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

1312023121212 is a wasteful number, since it uses less digits than its factorization.

1312023121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666713709 (or 2666713707 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1312023121212 its reverse (2121213202131), we get a palindrome (3433236323343).

The spelling of 1312023121212 in words is "one trillion, three hundred twelve billion, twenty-three million, one hundred twenty-one thousand, two hundred twelve".