210000121201020 has 24 divisors (see below), whose sum is σ = 588000339363024. Its totient is φ = 56000032320256.

The previous prime is 210000121201009. The next prime is 210000121201021. The reversal of 210000121201020 is 20102121000012.

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 = 210000121200987 and 210000121201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000121201021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1750001009949 + ... + 1750001010068.

It is an arithmetic number, because the mean of its divisors is an integer number (24500014140126).

Almost surely, 2^{210000121201020} is an apocalyptic number.

210000121201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210000121201020 is an abundant number, since it is smaller than the sum of its proper divisors (378000218162004).

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

210000121201020 is a wasteful number, since it uses less digits than its factorization.

210000121201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500002020029 (or 3500002020027 counting only the distinct ones).

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

Adding to 210000121201020 its reverse (20102121000012), we get a palindrome (230102242201032).

The spelling of 210000121201020 in words is "two hundred ten trillion, one hundred twenty-one million, two hundred one thousand, twenty".