121122221212 has 48 divisors (see below), whose sum is σ = 224904480640. Its totient is φ = 56915980992.

The previous prime is 121122221201. The next prime is 121122221257. The reversal of 121122221212 is 212122221121.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 121122221212.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7664383 + ... + 7680169.

Almost surely, 2^121122221212 is an apocalyptic number.

It is an amenable number.

121122221212 is a deficient number, since it is larger than the sum of its proper divisors (103782259428).

121122221212 is a wasteful number, since it uses less digits than its factorization.

121122221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16610 (or 16608 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

Adding to 121122221212 its reverse (212122221121), we get a palindrome (333244442333).

Subtracting 121122221212 from its reverse (212122221121), we obtain a palindrome (90999999909).

The spelling of 121122221212 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".