101211220111 has 8 divisors (see below), whose sum is σ = 107263067184. Its totient is φ = 95170289280.

The previous prime is 101211220087. The next prime is 101211220133. The reversal of 101211220111 is 111022112101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 101211220111 - 2⁵ = 101211220079 is a prime.

It is a super-2 number, since 2×101211220111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101211220091 and 101211220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211224111) 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, 2709960 + ... + 2747053.

It is an arithmetic number, because the mean of its divisors is an integer number (13407883398).

Almost surely, 2^101211220111 is an apocalyptic number.

101211220111 is a deficient number, since it is larger than the sum of its proper divisors (6051847073).

101211220111 is a wasteful number, since it uses less digits than its factorization.

101211220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5458121.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101211220111 its reverse (111022112101), we get a palindrome (212233332212).

The spelling of 101211220111 in words is "one hundred one billion, two hundred eleven million, two hundred twenty thousand, one hundred eleven".