210000211221121 has 16 divisors (see below), whose sum is σ = 217102576648960. Its totient is φ = 203029394071680.

The previous prime is 210000211221043. The next prime is 210000211221181. The reversal of 210000211221121 is 121122112000012.

It is a cyclic number.

It is not a de Polignac number, because 210000211221121 - 2⁹ = 210000211220609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210000211221095 and 210000211221104.

It is not an unprimeable number, because it can be changed into a prime (210000211221181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54349401 + ... + 58084918.

It is an arithmetic number, because the mean of its divisors is an integer number (13568911040560).

Almost surely, 2^{210000211221121} is an apocalyptic number.

It is an amenable number.

210000211221121 is a deficient number, since it is larger than the sum of its proper divisors (7102365427839).

210000211221121 is a wasteful number, since it uses less digits than its factorization.

210000211221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112434904.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210000211221121 its reverse (121122112000012), we get a palindrome (331122323221133).

The spelling of 210000211221121 in words is "two hundred ten trillion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".