111010012220021 has 8 divisors (see below), whose sum is σ = 112426372749600. Its totient is φ = 109602476367120.

The previous prime is 111010012219879. The next prime is 111010012220057. The reversal of 111010012220021 is 120022210010111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111010012220021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111010012219978 and 111010012220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010012223021) 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, 2206143851 + ... + 2206194168.

It is an arithmetic number, because the mean of its divisors is an integer number (14053296593700).

Almost surely, 2^{111010012220021} is an apocalyptic number.

It is an amenable number.

111010012220021 is a deficient number, since it is larger than the sum of its proper divisors (1416360529579).

111010012220021 is a wasteful number, since it uses less digits than its factorization.

111010012220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412338339.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111010012220021 its reverse (120022210010111), we get a palindrome (231032222230132).

The spelling of 111010012220021 in words is "one hundred eleven trillion, ten billion, twelve million, two hundred twenty thousand, twenty-one".