111020211021 has 8 divisors (see below), whose sum is σ = 148034304544. Its totient is φ = 74009795760.

The previous prime is 111020211013. The next prime is 111020211023. The reversal of 111020211021 is 120112020111.

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

It is not a de Polignac number, because 111020211021 - 2³ = 111020211013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020210988 and 111020211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020211023) 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, 848350 + ... + 970431.

It is an arithmetic number, because the mean of its divisors is an integer number (18504288068).

Almost surely, 2^111020211021 is an apocalyptic number.

It is an amenable number.

111020211021 is a deficient number, since it is larger than the sum of its proper divisors (37014093523).

111020211021 is a wasteful number, since it uses less digits than its factorization.

111020211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839131.

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

Adding to 111020211021 its reverse (120112020111), we get a palindrome (231132231132).

The spelling of 111020211021 in words is "one hundred eleven billion, twenty million, two hundred eleven thousand, twenty-one".