202121000121020 has 24 divisors (see below), whose sum is σ = 424454943840144. Its totient is φ = 80848239365376.

The previous prime is 202121000121013. The next prime is 202121000121041. The reversal of 202121000121020 is 20121000121202.

It is a junction number, because it is equal to n+sod(n) for n = 202121000120986 and 202121000121004.

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 7 ways as a sum of consecutive naturals, for example, 544187 + ... + 20113133.

It is an arithmetic number, because the mean of its divisors is an integer number (17685622660006).

Almost surely, 2^{202121000121020} is an apocalyptic number.

202121000121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121000121020 is an abundant number, since it is smaller than the sum of its proper divisors (222333943719124).

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

202121000121020 is a wasteful number, since it uses less digits than its factorization.

202121000121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20085389 (or 20085387 counting only the distinct ones).

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

Adding to 202121000121020 its reverse (20121000121202), we get a palindrome (222242000242222).

The spelling of 202121000121020 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred twenty-one thousand, twenty".