121002102201020 has 24 divisors (see below), whose sum is σ = 254131222111200. Its totient is φ = 48395734692032.

The previous prime is 121002102201011. The next prime is 121002102201041. The reversal of 121002102201020 is 20102201200121.

It is a junction number, because it is equal to n+sod(n) for n = 121002102200986 and 121002102201004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318942455 + ... + 319321614.

It is an arithmetic number, because the mean of its divisors is an integer number (10588800921300).

Almost surely, 2^{121002102201020} is an apocalyptic number.

121002102201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002102201020 is an abundant number, since it is smaller than the sum of its proper divisors (133129119910180).

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

121002102201020 is a wasteful number, since it uses less digits than its factorization.

121002102201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638273557 (or 638273555 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121002102201020 its reverse (20102201200121), we get a palindrome (141104303401141).

The spelling of 121002102201020 in words is "one hundred twenty-one trillion, two billion, one hundred two million, two hundred one thousand, twenty".