111012111120021 has 32 divisors (see below), whose sum is σ = 149634183552000. Its totient is φ = 73203099331968.

The previous prime is 111012111119999. The next prime is 111012111120023. The reversal of 111012111120021 is 120021111210111.

It is not a de Polignac number, because 111012111120021 - 2⁹ = 111012111119509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012111120023) 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, 693706665 + ... + 693866673.

It is an arithmetic number, because the mean of its divisors is an integer number (4676068236000).

Almost surely, 2^{111012111120021} is an apocalyptic number.

It is an amenable number.

111012111120021 is a deficient number, since it is larger than the sum of its proper divisors (38622072431979).

111012111120021 is a wasteful number, since it uses less digits than its factorization.

111012111120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166313.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111012111120021 its reverse (120021111210111), we get a palindrome (231033222330132).

The spelling of 111012111120021 in words is "one hundred eleven trillion, twelve billion, one hundred eleven million, one hundred twenty thousand, twenty-one".