111100211102021 has 16 divisors (see below), whose sum is σ = 118097263191600. Its totient is φ = 104154491781120.

The previous prime is 111100211102017. The next prime is 111100211102051. The reversal of 111100211102021 is 120201112001111.

It can be written as a sum of positive squares in 8 ways, for example, as 14983951969921 + 96116259132100 = 3870911^2 + 9803890^2 .

It is a cyclic number.

It is not a de Polignac number, because 111100211102021 - 2² = 111100211102017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111100211101987 and 111100211102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100211102051) 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, 132614111 + ... + 133449251.

It is an arithmetic number, because the mean of its divisors is an integer number (7381078949475).

Almost surely, 2^{111100211102021} is an apocalyptic number.

It is an amenable number.

111100211102021 is a deficient number, since it is larger than the sum of its proper divisors (6997052089579).

111100211102021 is a wasteful number, since it uses less digits than its factorization.

111100211102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865864.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111100211102021 its reverse (120201112001111), we get a palindrome (231301323103132).

The spelling of 111100211102021 in words is "one hundred eleven trillion, one hundred billion, two hundred eleven million, one hundred two thousand, twenty-one".