121122220110012 has 144 divisors (see below), whose sum is σ = 348536241301248. Its totient is φ = 35106817743360.

The previous prime is 121122220110007. The next prime is 121122220110083. The reversal of 121122220110012 is 210011022221121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 327001588 + ... + 327371780.

It is an arithmetic number, because the mean of its divisors is an integer number (2420390564592).

Almost surely, 2^{121122220110012} is an apocalyptic number.

121122220110012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121122220110012 is an abundant number, since it is smaller than the sum of its proper divisors (227414021191236).

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

121122220110012 is a wasteful number, since it uses less digits than its factorization.

121122220110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406160 (or 406155 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121122220110012 its reverse (210011022221121), we get a palindrome (331133242331133).

The spelling of 121122220110012 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, one hundred ten thousand, twelve".