121101020220 has 48 divisors (see below), whose sum is σ = 347353177248. Its totient is φ = 31505955840.

The previous prime is 121101020219. The next prime is 121101020237. The reversal of 121101020220 is 22020101121.

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 = 121101020196 and 121101020205.

It is a congruent number.

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, 24611569 + ... + 24616488.

It is an arithmetic number, because the mean of its divisors is an integer number (7236524526).

Almost surely, 2^121101020220 is an apocalyptic number.

121101020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101020220 is an abundant number, since it is smaller than the sum of its proper divisors (226252157028).

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

121101020220 is a wasteful number, since it uses less digits than its factorization.

121101020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49228110 (or 49228108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121101020220 its reverse (22020101121), we get a palindrome (143121121341).

The spelling of 121101020220 in words is "one hundred twenty-one billion, one hundred one million, twenty thousand, two hundred twenty".