121918284212 has 12 divisors (see below), whose sum is σ = 213359566560. Its totient is φ = 60958408056.

The previous prime is 121918284211. The next prime is 121918284233. The reversal of 121918284212 is 212482819121.

It is a self number, because there is not a number n which added to its sum of digits gives 121918284212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121918284211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387839 + ... + 627897.

It is an arithmetic number, because the mean of its divisors is an integer number (17779963880).

Almost surely, 2^121918284212 is an apocalyptic number.

It is an amenable number.

121918284212 is a deficient number, since it is larger than the sum of its proper divisors (91441282348).

121918284212 is a wasteful number, since it uses less digits than its factorization.

121918284212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367030 (or 367028 counting only the distinct ones).

The product of its digits is 36864, while the sum is 41.

The spelling of 121918284212 in words is "one hundred twenty-one billion, nine hundred eighteen million, two hundred eighty-four thousand, two hundred twelve".