212212021101 has 4 divisors (see below), whose sum is σ = 282949361472. Its totient is φ = 141474680732.

The previous prime is 212212021097. The next prime is 212212021159. The reversal of 212212021101 is 101120212212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212212021101 - 2² = 212212021097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212021501) 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, 35368670181 + ... + 35368670186.

It is an arithmetic number, because the mean of its divisors is an integer number (70737340368).

Almost surely, 2^212212021101 is an apocalyptic number.

It is an amenable number.

212212021101 is a deficient number, since it is larger than the sum of its proper divisors (70737340371).

212212021101 is an equidigital number, since it uses as much as digits as its factorization.

212212021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70737340370.

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

Adding to 212212021101 its reverse (101120212212), we get a palindrome (313332233313).

The spelling of 212212021101 in words is "two hundred twelve billion, two hundred twelve million, twenty-one thousand, one hundred one".