211220102100111 has 16 divisors (see below), whose sum is σ = 310343668204416. Its totient is φ = 126958773354336.

The previous prime is 211220102100089. The next prime is 211220102100127. The reversal of 211220102100111 is 111001201022112.

It is a happy number.

It is not a de Polignac number, because 211220102100111 - 2¹³ = 211220102091919 is a prime.

It is a super-2 number, since 2×211220102100111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220102100311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62975580345 + ... + 62975583698.

It is an arithmetic number, because the mean of its divisors is an integer number (19396479262776).

Almost surely, 2^{211220102100111} is an apocalyptic number.

211220102100111 is a deficient number, since it is larger than the sum of its proper divisors (99123566104305).

211220102100111 is a wasteful number, since it uses less digits than its factorization.

211220102100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125951164102.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211220102100111 its reverse (111001201022112), we get a palindrome (322221303122223).

The spelling of 211220102100111 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred two million, one hundred thousand, one hundred eleven".