111020021021 has 8 divisors (see below), whose sum is σ = 136640025984. Its totient is φ = 87840016560.

The previous prime is 111020020997. The next prime is 111020021039. The reversal of 111020021021 is 120120020111.

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 111020021021 - 2¹⁴ = 111020004637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020020993 and 111020021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020021071) 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, 610000025 + ... + 610000206.

It is an arithmetic number, because the mean of its divisors is an integer number (17080003248).

Almost surely, 2^111020021021 is an apocalyptic number.

It is an amenable number.

111020021021 is a deficient number, since it is larger than the sum of its proper divisors (25620004963).

111020021021 is a wasteful number, since it uses less digits than its factorization.

111020021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220000251.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111020021021 its reverse (120120020111), we get a palindrome (231140041132).

The spelling of 111020021021 in words is "one hundred eleven billion, twenty million, twenty-one thousand, twenty-one".