121310110012 has 96 divisors (see below), whose sum is σ = 263400367104. Its totient is φ = 47602944000.

The previous prime is 121310109979. The next prime is 121310110013. The reversal of 121310110012 is 210011013121.

It is a happy number.

It is a super-2 number, since 2×121310110012² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 121310109974 and 121310110001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310110013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53368908 + ... + 53371180.

It is an arithmetic number, because the mean of its divisors is an integer number (2743753824).

Almost surely, 2^121310110012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121310110012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131700183552).

121310110012 is an abundant number, since it is smaller than the sum of its proper divisors (142090257092).

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

121310110012 is a wasteful number, since it uses less digits than its factorization.

121310110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419 (or 3417 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121310110012 its reverse (210011013121), we get a palindrome (331321123133).

The spelling of 121310110012 in words is "one hundred twenty-one billion, three hundred ten million, one hundred ten thousand, twelve".