212210111112101 has 4 divisors (see below), whose sum is σ = 212312677625100. Its totient is φ = 212107544599104.

The previous prime is 212210111112079. The next prime is 212210111112133. The reversal of 212210111112101 is 101211111012212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30936900789025 + 181273210323076 = 5562095^2 + 13463774^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210111112101 - 2³⁰ = 212209037370277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212210111112101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210111112401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51283253396 + ... + 51283257533.

It is an arithmetic number, because the mean of its divisors is an integer number (53078169406275).

Almost surely, 2^{212210111112101} is an apocalyptic number.

It is an amenable number.

212210111112101 is a deficient number, since it is larger than the sum of its proper divisors (102566512999).

212210111112101 is a wasteful number, since it uses less digits than its factorization.

212210111112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102566512998.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 212210111112101 its reverse (101211111012212), we get a palindrome (313421222124313).

The spelling of 212210111112101 in words is "two hundred twelve trillion, two hundred ten billion, one hundred eleven million, one hundred twelve thousand, one hundred one".