121001100011220 has 96 divisors (see below), whose sum is σ = 398034387757440. Its totient is φ = 27077169231360.

The previous prime is 121001100011219. The next prime is 121001100011249. The reversal of 121001100011220 is 22110001100121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121001100011196 and 121001100011205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7051337575 + ... + 7051354734.

It is an arithmetic number, because the mean of its divisors is an integer number (4146191539140).

Almost surely, 2^{121001100011220} is an apocalyptic number.

121001100011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001100011220 is an abundant number, since it is smaller than the sum of its proper divisors (277033287746220).

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

121001100011220 is a wasteful number, since it uses less digits than its factorization.

121001100011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14102692345 (or 14102692343 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121001100011220 its reverse (22110001100121), we get a palindrome (143111101111341).

The spelling of 121001100011220 in words is "one hundred twenty-one trillion, one billion, one hundred million, eleven thousand, two hundred twenty".