111021012021 has 8 divisors (see below), whose sum is σ = 155818964320. Its totient is φ = 70118533872.

The previous prime is 111021011999. The next prime is 111021012023. The reversal of 111021012021 is 120210120111.

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

It is not a de Polignac number, because 111021012021 - 2¹¹ = 111021009973 is a prime.

It is a super-2 number, since 2×111021012021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111021011988 and 111021012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021012023) 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, 973868470 + ... + 973868583.

It is an arithmetic number, because the mean of its divisors is an integer number (19477370540).

Almost surely, 2^111021012021 is an apocalyptic number.

It is an amenable number.

111021012021 is a deficient number, since it is larger than the sum of its proper divisors (44797952299).

111021012021 is a wasteful number, since it uses less digits than its factorization.

111021012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947737075.

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

Adding to 111021012021 its reverse (120210120111), we get a palindrome (231231132132).

The spelling of 111021012021 in words is "one hundred eleven billion, twenty-one million, twelve thousand, twenty-one".