111010102021 has 24 divisors (see below), whose sum is σ = 138738852864. Its totient is φ = 86962449600.

The previous prime is 111010102019. The next prime is 111010102039. The reversal of 111010102021 is 120201010111.

It is not a de Polignac number, because 111010102021 - 2¹ = 111010102019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111010101989 and 111010102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010102121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345061 + ... + 584026.

It is an arithmetic number, because the mean of its divisors is an integer number (5780785536).

Almost surely, 2^111010102021 is an apocalyptic number.

It is an amenable number.

111010102021 is a deficient number, since it is larger than the sum of its proper divisors (27728750843).

111010102021 is a wasteful number, since it uses less digits than its factorization.

111010102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929221 (or 929208 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111010102021 its reverse (120201010111), we get a palindrome (231211112132).

The spelling of 111010102021 in words is "one hundred eleven billion, ten million, one hundred two thousand, twenty-one".