111020210010021 has 32 divisors (see below), whose sum is σ = 162266850006912. Its totient is φ = 67106838769920.

The previous prime is 111020210009987. The next prime is 111020210010079. The reversal of 111020210010021 is 120010012020111.

It is not a de Polignac number, because 111020210010021 - 2¹⁹ = 111020209485733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020210009979 and 111020210010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020210010121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98565010 + ... + 99685011.

It is an arithmetic number, because the mean of its divisors is an integer number (5070839062716).

Almost surely, 2^{111020210010021} is an apocalyptic number.

It is an amenable number.

111020210010021 is a deficient number, since it is larger than the sum of its proper divisors (51246639996891).

111020210010021 is a wasteful number, since it uses less digits than its factorization.

111020210010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198250293.

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

Adding to 111020210010021 its reverse (120010012020111), we get a palindrome (231030222030132).

The spelling of 111020210010021 in words is "one hundred eleven trillion, twenty billion, two hundred ten million, ten thousand, twenty-one".