121121210122012 has 48 divisors (see below), whose sum is σ = 215173866247200. Its totient is φ = 59649741785088.

The previous prime is 121121210121887. The next prime is 121121210122013. The reversal of 121121210122012 is 210221012121121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121210122013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693424864 + ... + 693599512.

It is an arithmetic number, because the mean of its divisors is an integer number (4482788880150).

Almost surely, 2^{121121210122012} is an apocalyptic number.

It is an amenable number.

121121210122012 is a deficient number, since it is larger than the sum of its proper divisors (94052656125188).

121121210122012 is a wasteful number, since it uses less digits than its factorization.

121121210122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184342 (or 184340 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121210122012 its reverse (210221012121121), we get a palindrome (331342222243133).

The spelling of 121121210122012 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-two thousand, twelve".