212011100121 has 16 divisors (see below), whose sum is σ = 290384265600. Its totient is φ = 137490985728.

The previous prime is 212011100117. The next prime is 212011100129. The reversal of 212011100121 is 121001110212.

It is not a de Polignac number, because 212011100121 - 2² = 212011100117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212011100097 and 212011100106.

It is not an unprimeable number, because it can be changed into a prime (212011100129) 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, 315265 + ... + 723473.

It is an arithmetic number, because the mean of its divisors is an integer number (18149016600).

Almost surely, 2^212011100121 is an apocalyptic number.

It is an amenable number.

212011100121 is a deficient number, since it is larger than the sum of its proper divisors (78373165479).

212011100121 is a wasteful number, since it uses less digits than its factorization.

212011100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412928.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 212011100121 its reverse (121001110212), we get a palindrome (333012210333).

The spelling of 212011100121 in words is "two hundred twelve billion, eleven million, one hundred thousand, one hundred twenty-one".