121251110012 has 12 divisors (see below), whose sum is σ = 224671174560. Its totient is φ = 57059345856.

The previous prime is 121251109979. The next prime is 121251110021. The reversal of 121251110012 is 210011152121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891552212 + ... + 891552347.

It is an arithmetic number, because the mean of its divisors is an integer number (18722597880).

Almost surely, 2^121251110012 is an apocalyptic number.

It is an amenable number.

121251110012 is a deficient number, since it is larger than the sum of its proper divisors (103420064548).

121251110012 is a wasteful number, since it uses less digits than its factorization.

121251110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783104580 (or 1783104578 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 121251110012 its reverse (210011152121), we get a palindrome (331262262133).

The spelling of 121251110012 in words is "one hundred twenty-one billion, two hundred fifty-one million, one hundred ten thousand, twelve".