210021102222121 has 8 divisors (see below), whose sum is σ = 219152983783680. Its totient is φ = 200889264768192.

The previous prime is 210021102222053. The next prime is 210021102222163. The reversal of 210021102222121 is 121222201120012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210021102222121 - 2⁷ = 210021102221993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021102222821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1106865 + ... + 20524798.

It is an arithmetic number, because the mean of its divisors is an integer number (27394122972960).

Almost surely, 2^{210021102222121} is an apocalyptic number.

It is an amenable number.

210021102222121 is a deficient number, since it is larger than the sum of its proper divisors (9131881561559).

210021102222121 is a wasteful number, since it uses less digits than its factorization.

210021102222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22053815.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210021102222121 its reverse (121222201120012), we get a palindrome (331243303342133).

The spelling of 210021102222121 in words is "two hundred ten trillion, twenty-one billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-one".