212100012200121 has 32 divisors (see below), whose sum is σ = 287795786987520. Its totient is φ = 138905513507904.

The previous prime is 212100012200107. The next prime is 212100012200173. The reversal of 212100012200121 is 121002210001212.

It is not a de Polignac number, because 212100012200121 - 2⁷ = 212100012199993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212100012200121.

It is not an unprimeable number, because it can be changed into a prime (212100012200221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4541441056 + ... + 4541487758.

It is an arithmetic number, because the mean of its divisors is an integer number (8993618343360).

Almost surely, 2^{212100012200121} is an apocalyptic number.

It is an amenable number.

212100012200121 is a deficient number, since it is larger than the sum of its proper divisors (75695774787399).

212100012200121 is a wasteful number, since it uses less digits than its factorization.

212100012200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64285.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212100012200121 its reverse (121002210001212), we get a palindrome (333102222201333).

The spelling of 212100012200121 in words is "two hundred twelve trillion, one hundred billion, twelve million, two hundred thousand, one hundred twenty-one".