210121022000121 has 16 divisors (see below), whose sum is σ = 281690827965504. Its totient is φ = 139317243747584.

The previous prime is 210121022000089. The next prime is 210121022000167. The reversal of 210121022000121 is 121000220121012.

It is a cyclic number.

It is not a de Polignac number, because 210121022000121 - 2⁵ = 210121022000089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210121022000121.

It is not an unprimeable number, because it can be changed into a prime (210121022000921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161233356 + ... + 162531341.

It is an arithmetic number, because the mean of its divisors is an integer number (17605676747844).

Almost surely, 2^{210121022000121} is an apocalyptic number.

It is an amenable number.

210121022000121 is a deficient number, since it is larger than the sum of its proper divisors (71569805965383).

210121022000121 is a wasteful number, since it uses less digits than its factorization.

210121022000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323765880.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210121022000121 its reverse (121000220121012), we get a palindrome (331121242121133).

The spelling of 210121022000121 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-one", and thus it is an aban number.