212102121100001 has 16 divisors (see below), whose sum is σ = 243589038086400. Its totient is φ = 182651587923600.

The previous prime is 212102121099997. The next prime is 212102121100141. The reversal of 212102121100001 is 100001121201212.

It is a cyclic number.

It is not a de Polignac number, because 212102121100001 - 2² = 212102121099997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212102123100001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53915771 + ... + 57715808.

It is an arithmetic number, because the mean of its divisors is an integer number (15224314880400).

Almost surely, 2^{212102121100001} is an apocalyptic number.

It is an amenable number.

212102121100001 is a deficient number, since it is larger than the sum of its proper divisors (31486916986399).

212102121100001 is a wasteful number, since it uses less digits than its factorization.

212102121100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111640700.

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

Adding to 212102121100001 its reverse (100001121201212), we get a palindrome (312103242301213).

The spelling of 212102121100001 in words is "two hundred twelve trillion, one hundred two billion, one hundred twenty-one million, one hundred thousand, one".