121121022201020 has 24 divisors (see below), whose sum is σ = 262559119095168. Its totient is φ = 46885556980800.

The previous prime is 121121022201013. The next prime is 121121022201029. The reversal of 121121022201020 is 20102220121121.

It is a self number, because there is not a number n which added to its sum of digits gives 121121022201020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121022201029) by changing a digit.

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, 97678243091 + ... + 97678244330.

It is an arithmetic number, because the mean of its divisors is an integer number (10939963295632).

Almost surely, 2^{121121022201020} is an apocalyptic number.

121121022201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121022201020 is an abundant number, since it is smaller than the sum of its proper divisors (141438096894148).

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

121121022201020 is a wasteful number, since it uses less digits than its factorization.

121121022201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195356487461 (or 195356487459 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121121022201020 its reverse (20102220121121), we get a palindrome (141223242322141).

The spelling of 121121022201020 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-two million, two hundred one thousand, twenty".