121100102100220 has 24 divisors (see below), whose sum is σ = 269269638788304. Its totient is φ = 45590626672896.

The previous prime is 121100102100157. The next prime is 121100102100247. The reversal of 121100102100220 is 22001201001121.

It is a self number, because there is not a number n which added to its sum of digits gives 121100102100220.

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 7 ways as a sum of consecutive naturals, for example, 178088385102 + ... + 178088385781.

It is an arithmetic number, because the mean of its divisors is an integer number (11219568282846).

Almost surely, 2^{121100102100220} is an apocalyptic number.

121100102100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100102100220 is an abundant number, since it is smaller than the sum of its proper divisors (148169536688084).

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

121100102100220 is a wasteful number, since it uses less digits than its factorization.

121100102100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356176770909 (or 356176770907 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121100102100220 its reverse (22001201001121), we get a palindrome (143101303101341).

The spelling of 121100102100220 in words is "one hundred twenty-one trillion, one hundred billion, one hundred two million, one hundred thousand, two hundred twenty".