121020100012 has 96 divisors (see below), whose sum is σ = 258213473280. Its totient is φ = 48477139200.

The previous prime is 121020099979. The next prime is 121020100051. The reversal of 121020100012 is 210001020121.

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 31 ways as a sum of consecutive naturals, for example, 15739633 + ... + 15747319.

It is an arithmetic number, because the mean of its divisors is an integer number (2689723680).

Almost surely, 2^121020100012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121020100012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129106736640).

121020100012 is an abundant number, since it is smaller than the sum of its proper divisors (137193373268).

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

121020100012 is a wasteful number, since it uses less digits than its factorization.

121020100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111 (or 8109 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121020100012 its reverse (210001020121), we get a palindrome (331021120133).

The spelling of 121020100012 in words is "one hundred twenty-one billion, twenty million, one hundred thousand, twelve".