211211021200121 has 8 divisors (see below), whose sum is σ = 219953698358784. Its totient is φ = 202588932692160.

The previous prime is 211211021200063. The next prime is 211211021200129. The reversal of 211211021200121 is 121002120112112.

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 211211021200121 - 2¹⁰ = 211211021199097 is a prime.

It is a super-2 number, since 2×211211021200121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211211021200121.

It is not an unprimeable number, because it can be changed into a prime (211211021200129) 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, 30147159101 + ... + 30147166106.

It is an arithmetic number, because the mean of its divisors is an integer number (27494212294848).

Almost surely, 2^{211211021200121} is an apocalyptic number.

It is an amenable number.

211211021200121 is a deficient number, since it is larger than the sum of its proper divisors (8742677158663).

211211021200121 is a wasteful number, since it uses less digits than its factorization.

211211021200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60294325351.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211211021200121 its reverse (121002120112112), we get a palindrome (332213141312233).

The spelling of 211211021200121 in words is "two hundred eleven trillion, two hundred eleven billion, twenty-one million, two hundred thousand, one hundred twenty-one".