211201222100121 has 24 divisors (see below), whose sum is σ = 343537471729920. Its totient is φ = 123871684514400.

The previous prime is 211201222100101. The next prime is 211201222100161. The reversal of 211201222100121 is 121001222102112.

211201222100121 is a `hidden beast` number, since 21 + 1 + 201 + 222 + 100 + 121 = 666.

It is not a de Polignac number, because 211201222100121 - 2³⁵ = 211166862361753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211201222100094 and 211201222100103.

It is not an unprimeable number, because it can be changed into a prime (211201222100101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34408798186 + ... + 34408804323.

It is an arithmetic number, because the mean of its divisors is an integer number (14314061322080).

Almost surely, 2^{211201222100121} is an apocalyptic number.

It is an amenable number.

211201222100121 is a deficient number, since it is larger than the sum of its proper divisors (132336249629799).

211201222100121 is a wasteful number, since it uses less digits than its factorization.

211201222100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68817602557 (or 68817602554 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211201222100121 its reverse (121001222102112), we get a palindrome (332202444202233).

The spelling of 211201222100121 in words is "two hundred eleven trillion, two hundred one billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-one".