212220111111101 has 8 divisors (see below), whose sum is σ = 212490799755960. Its totient is φ = 211949594500608.

The previous prime is 212220111111007. The next prime is 212220111111103. The reversal of 212220111111101 is 101111111022212.

It can be written as a sum of positive squares in 4 ways, for example, as 3133427482201 + 209086683628900 = 1770149^2 + 14459830^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212220111111101 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 212220111111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220111111103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40539746 + ... + 45474291.

It is an arithmetic number, because the mean of its divisors is an integer number (26561349969495).

Almost surely, 2^{212220111111101} is an apocalyptic number.

It is an amenable number.

212220111111101 is a deficient number, since it is larger than the sum of its proper divisors (270688644859).

212220111111101 is a wasteful number, since it uses less digits than its factorization.

212220111111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86017183.

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

Adding to 212220111111101 its reverse (101111111022212), we get a palindrome (313331222133313).

The spelling of 212220111111101 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred eleven million, one hundred eleven thousand, one hundred one".