210210121100121 has 16 divisors (see below), whose sum is σ = 289330981486080. Its totient is φ = 135614968364160.

The previous prime is 210210121100117. The next prime is 210210121100129. The reversal of 210210121100121 is 121001121012012.

It is a happy number.

It is not a de Polignac number, because 210210121100121 - 2² = 210210121100117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210210121100121.

It is not an unprimeable number, because it can be changed into a prime (210210121100129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34363660 + ... + 40016013.

It is an arithmetic number, because the mean of its divisors is an integer number (18083186342880).

Almost surely, 2^{210210121100121} is an apocalyptic number.

It is an amenable number.

210210121100121 is a deficient number, since it is larger than the sum of its proper divisors (79120860385959).

210210121100121 is a wasteful number, since it uses less digits than its factorization.

210210121100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74410096.

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

Adding to 210210121100121 its reverse (121001121012012), we get a palindrome (331211242112133).

The spelling of 210210121100121 in words is "two hundred ten trillion, two hundred ten billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-one".