210121001101020 has 24 divisors (see below), whose sum is σ = 588338803083024. Its totient is φ = 56032266960256.

The previous prime is 210121001100961. The next prime is 210121001101027. The reversal of 210121001101020 is 20101100121012.

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 = 210121001100987 and 210121001101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121001101027) 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, 1751008342449 + ... + 1751008342568.

It is an arithmetic number, because the mean of its divisors is an integer number (24514116795126).

Almost surely, 2^{210121001101020} is an apocalyptic number.

210121001101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121001101020 is an abundant number, since it is smaller than the sum of its proper divisors (378217801982004).

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

210121001101020 is a wasteful number, since it uses less digits than its factorization.

210121001101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502016685029 (or 3502016685027 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210121001101020 its reverse (20101100121012), we get a palindrome (230222101222032).

The spelling of 210121001101020 in words is "two hundred ten trillion, one hundred twenty-one billion, one million, one hundred one thousand, twenty".