111101020221 has 32 divisors (see below), whose sum is σ = 153152778240. Its totient is φ = 71593558400.

The previous prime is 111101020181. The next prime is 111101020231. The reversal of 111101020221 is 122020101111.

It is a cyclic number.

It is not a de Polignac number, because 111101020221 - 2¹⁴ = 111101003837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111101020197 and 111101020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101020231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10613236 + ... + 10623698.

It is an arithmetic number, because the mean of its divisors is an integer number (4786024320).

Almost surely, 2^111101020221 is an apocalyptic number.

It is an amenable number.

111101020221 is a deficient number, since it is larger than the sum of its proper divisors (42051758019).

111101020221 is a wasteful number, since it uses less digits than its factorization.

111101020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11297.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111101020221 its reverse (122020101111), we get a palindrome (233121121332).

The spelling of 111101020221 in words is "one hundred eleven billion, one hundred one million, twenty thousand, two hundred twenty-one".