210121010016 has 24 divisors (see below), whose sum is σ = 551567651544. Its totient is φ = 70040336640.

The previous prime is 210121009951. The next prime is 210121010017. The reversal of 210121010016 is 610010121012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 210121009977 and 210121010004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121010017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094380165 + ... + 1094380356.

It is an arithmetic number, because the mean of its divisors is an integer number (22981985481).

Almost surely, 2^210121010016 is an apocalyptic number.

It is an amenable number.

210121010016 is an abundant number, since it is smaller than the sum of its proper divisors (341446641528).

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

210121010016 is a wasteful number, since it uses less digits than its factorization.

210121010016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188760534 (or 2188760526 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 210121010016 its reverse (610010121012), we get a palindrome (820131131028).

The spelling of 210121010016 in words is "two hundred ten billion, one hundred twenty-one million, ten thousand, sixteen".