111020001022221 has 32 divisors (see below), whose sum is σ = 152311894565376. Its totient is φ = 71887191552000.

The previous prime is 111020001022187. The next prime is 111020001022291. The reversal of 111020001022221 is 122220100020111.

It is not a de Polignac number, because 111020001022221 - 2⁷ = 111020001022093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111020001022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020001022291) 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, 42772245 + ... + 45293541.

It is an arithmetic number, because the mean of its divisors is an integer number (4759746705168).

Almost surely, 2^{111020001022221} is an apocalyptic number.

It is an amenable number.

111020001022221 is a deficient number, since it is larger than the sum of its proper divisors (41291893543155).

111020001022221 is a wasteful number, since it uses less digits than its factorization.

111020001022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522933.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111020001022221 its reverse (122220100020111), we get a palindrome (233240101042332).

The spelling of 111020001022221 in words is "one hundred eleven trillion, twenty billion, one million, twenty-two thousand, two hundred twenty-one".