111001010120221 has 8 divisors (see below), whose sum is σ = 119539660499840. Its totient is φ = 102462375617712.

The previous prime is 111001010120207. The next prime is 111001010120251. The reversal of 111001010120221 is 122021010100111.

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 111001010120221 - 2²¹ = 111001008023069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001010120251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13349920 + ... + 20005558.

It is an arithmetic number, because the mean of its divisors is an integer number (14942457562480).

Almost surely, 2^{111001010120221} is an apocalyptic number.

It is an amenable number.

111001010120221 is a deficient number, since it is larger than the sum of its proper divisors (8538650379619).

111001010120221 is a wasteful number, since it uses less digits than its factorization.

111001010120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7938555.

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

Adding to 111001010120221 its reverse (122021010100111), we get a palindrome (233022020220332).

The spelling of 111001010120221 in words is "one hundred eleven trillion, one billion, ten million, one hundred twenty thousand, two hundred twenty-one".