121201020020220 has 96 divisors (see below), whose sum is σ = 387844861824000. Its totient is φ = 27702976164864.

The previous prime is 121201020020219. The next prime is 121201020020257. The reversal of 121201020020220 is 22020020102121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121201020020220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142358356 + ... + 143207204.

It is an arithmetic number, because the mean of its divisors is an integer number (4040050644000).

Almost surely, 2^{121201020020220} is an apocalyptic number.

121201020020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201020020220 is an abundant number, since it is smaller than the sum of its proper divisors (266643841803780).

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

121201020020220 is a wasteful number, since it uses less digits than its factorization.

121201020020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188827 (or 1188825 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121201020020220 its reverse (22020020102121), we get a palindrome (143221040122341).

The spelling of 121201020020220 in words is "one hundred twenty-one trillion, two hundred one billion, twenty million, twenty thousand, two hundred twenty".