212111202200121 has 24 divisors (see below), whose sum is σ = 350152217064000. Its totient is φ = 121206265838496.

The previous prime is 212111202200101. The next prime is 212111202200153. The reversal of 212111202200121 is 121002202111212.

212111202200121 is a `hidden beast` number, since 212 + 1 + 112 + 0 + 220 + 0 + 121 = 666.

It is not a de Polignac number, because 212111202200121 - 2¹⁷ = 212111202069049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212111202200094 and 212111202200103.

It is not an unprimeable number, because it can be changed into a prime (212111202200101) 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, 91321246 + ... + 93615128.

It is an arithmetic number, because the mean of its divisors is an integer number (14589675711000).

Almost surely, 2^{212111202200121} is an apocalyptic number.

212111202200121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212111202200121 is a deficient number, since it is larger than the sum of its proper divisors (138041014863879).

212111202200121 is a wasteful number, since it uses less digits than its factorization.

212111202200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761645 (or 3761642 counting only the distinct ones).

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

Adding to 212111202200121 its reverse (121002202111212), we get a palindrome (333113404311333).

The spelling of 212111202200121 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred two million, two hundred thousand, one hundred twenty-one".