1023121231212 has 48 divisors (see below), whose sum is σ = 2527920565632. Its totient is φ = 320952633600.

The previous prime is 1023121231189. The next prime is 1023121231259. The reversal of 1023121231212 is 2121321213201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2338603 + ... + 2741405.

It is an arithmetic number, because the mean of its divisors is an integer number (52665011784).

Almost surely, 2^{1023121231212} is an apocalyptic number.

1023121231212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1023121231212 is an abundant number, since it is smaller than the sum of its proper divisors (1504799334420).

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

1023121231212 is a wasteful number, since it uses less digits than its factorization.

1023121231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415278 (or 415276 counting only the distinct ones).

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

Adding to 1023121231212 its reverse (2121321213201), we get a palindrome (3144442444413).

The spelling of 1023121231212 in words is "one trillion, twenty-three billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twelve".