210121012110120 has 32 divisors (see below), whose sum is σ = 630363036330720. Its totient is φ = 56032269896000.

The previous prime is 210121012110073. The next prime is 210121012110131. The reversal of 210121012110120 is 21011210121012.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 210121012110120.

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, 875504217006 + ... + 875504217245.

It is an arithmetic number, because the mean of its divisors is an integer number (19698844885335).

Almost surely, 2^{210121012110120} is an apocalyptic number.

210121012110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121012110120 is an abundant number, since it is smaller than the sum of its proper divisors (420242024220600).

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

210121012110120 is a wasteful number, since it uses less digits than its factorization.

210121012110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751008434265 (or 1751008434261 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210121012110120 its reverse (21011210121012), we get a palindrome (231132222231132).

The spelling of 210121012110120 in words is "two hundred ten trillion, one hundred twenty-one billion, twelve million, one hundred ten thousand, one hundred twenty".