121230212112 has 40 divisors (see below), whose sum is σ = 347975610080. Its totient is φ = 40410070560.

The previous prime is 121230212111. The next prime is 121230212141. The reversal of 121230212112 is 211212032121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121230212111) 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, 140312314 + ... + 140313177.

It is an arithmetic number, because the mean of its divisors is an integer number (8699390252).

Almost surely, 2^121230212112 is an apocalyptic number.

121230212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121230212112 is an abundant number, since it is smaller than the sum of its proper divisors (226745397968).

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

121230212112 is a wasteful number, since it uses less digits than its factorization.

121230212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280625508 (or 280625496 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121230212112 its reverse (211212032121), we get a palindrome (332442244233).

The spelling of 121230212112 in words is "one hundred twenty-one billion, two hundred thirty million, two hundred twelve thousand, one hundred twelve".