212111220101 has 8 divisors (see below), whose sum is σ = 236317336704. Its totient is φ = 188725649920.

The previous prime is 212111220077. The next prime is 212111220109. The reversal of 212111220101 is 101022111212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-212111220101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111220109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205136060 + ... + 205137093.

It is an arithmetic number, because the mean of its divisors is an integer number (29539667088).

Almost surely, 2^212111220101 is an apocalyptic number.

It is an amenable number.

212111220101 is a deficient number, since it is larger than the sum of its proper divisors (24206116603).

212111220101 is a wasteful number, since it uses less digits than its factorization.

212111220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410273211.

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

Adding to 212111220101 its reverse (101022111212), we get a palindrome (313133331313).

The spelling of 212111220101 in words is "two hundred twelve billion, one hundred eleven million, two hundred twenty thousand, one hundred one".