121231110012 has 24 divisors (see below), whose sum is σ = 282881967312. Its totient is φ = 40409030400.

The previous prime is 121231109999. The next prime is 121231110023. The reversal of 121231110012 is 210011132121.

It is a junction number, because it is equal to n+sod(n) for n = 121231109973 and 121231110000.

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, 251562 + ... + 552942.

It is an arithmetic number, because the mean of its divisors is an integer number (11786748638).

Almost surely, 2^121231110012 is an apocalyptic number.

121231110012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121231110012 is an abundant number, since it is smaller than the sum of its proper divisors (161650857300).

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

121231110012 is a wasteful number, since it uses less digits than its factorization.

121231110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334909 (or 334907 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121231110012 its reverse (210011132121), we get a palindrome (331242242133).

The spelling of 121231110012 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred ten thousand, twelve".