210020202121020 has 24 divisors (see below), whose sum is σ = 588056565939024. Its totient is φ = 56005387232256.

The previous prime is 210020202120983. The next prime is 210020202121069. The reversal of 210020202121020 is 20121202020012.

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

It is a congruent number.

It is an unprimeable number.

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, 1750168350949 + ... + 1750168351068.

It is an arithmetic number, because the mean of its divisors is an integer number (24502356914126).

Almost surely, 2^{210020202121020} is an apocalyptic number.

210020202121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210020202121020 is an abundant number, since it is smaller than the sum of its proper divisors (378036363818004).

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

210020202121020 is a wasteful number, since it uses less digits than its factorization.

210020202121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500336702029 (or 3500336702027 counting only the distinct ones).

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

Adding to 210020202121020 its reverse (20121202020012), we get a palindrome (230141404141032).

The spelling of 210020202121020 in words is "two hundred ten trillion, twenty billion, two hundred two million, one hundred twenty-one thousand, twenty".