210101221121 has 8 divisors (see below), whose sum is σ = 229282156224. Its totient is φ = 190933756720.

The previous prime is 210101221111. The next prime is 210101221139. The reversal of 210101221121 is 121122101012.

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 210101221121 - 2¹⁴ = 210101204737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210101221096 and 210101221105.

It is not an unprimeable number, because it can be changed into a prime (210101221111) 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, 3335045 + ... + 3397458.

It is an arithmetic number, because the mean of its divisors is an integer number (28660269528).

Almost surely, 2^210101221121 is an apocalyptic number.

It is an amenable number.

210101221121 is a deficient number, since it is larger than the sum of its proper divisors (19180935103).

210101221121 is a wasteful number, since it uses less digits than its factorization.

210101221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735351.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210101221121 its reverse (121122101012), we get a palindrome (331223322133).

The spelling of 210101221121 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty-one".