121221211023012 has 48 divisors (see below), whose sum is σ = 282954954929472. Its totient is φ = 40392006620160.

The previous prime is 121221211022987. The next prime is 121221211023049. The reversal of 121221211023012 is 210320112122121.

It is a self number, because there is not a number n which added to its sum of digits gives 121221211023012.

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, 430759312 + ... + 431040632.

It is an arithmetic number, because the mean of its divisors is an integer number (5894894894364).

Almost surely, 2^{121221211023012} is an apocalyptic number.

121221211023012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121221211023012 is an abundant number, since it is smaller than the sum of its proper divisors (161733743906460).

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

121221211023012 is a wasteful number, since it uses less digits than its factorization.

121221211023012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294588 (or 294586 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121221211023012 its reverse (210320112122121), we get a palindrome (331541323145133).

The spelling of 121221211023012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, twenty-three thousand, twelve".