111021221110021 has 8 divisors (see below), whose sum is σ = 112100018972864. Its totient is φ = 109942440976800.

The previous prime is 111021221109959. The next prime is 111021221110043. The reversal of 111021221110021 is 120011122120111.

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 111021221110021 - 2²³ = 111021212721413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111021221109977 and 111021221110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021221110421) 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, 8329921 + ... + 17071321.

It is an arithmetic number, because the mean of its divisors is an integer number (14012502371608).

Almost surely, 2^{111021221110021} is an apocalyptic number.

It is an amenable number.

111021221110021 is a deficient number, since it is larger than the sum of its proper divisors (1078797862843).

111021221110021 is a wasteful number, since it uses less digits than its factorization.

111021221110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864811.

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

Adding to 111021221110021 its reverse (120011122120111), we get a palindrome (231032343230132).

The spelling of 111021221110021 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred ten thousand, twenty-one".