111120012210021 has 16 divisors (see below), whose sum is σ = 148411294092864. Its totient is φ = 73954371642624.

The previous prime is 111120012210019. The next prime is 111120012210061. The reversal of 111120012210021 is 120012210021111.

It is a happy number.

It is not a de Polignac number, because 111120012210021 - 2¹ = 111120012210019 is a prime.

It is a super-2 number, since 2×111120012210021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120012210061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237061335 + ... + 237529611.

It is an arithmetic number, because the mean of its divisors is an integer number (9275705880804).

Almost surely, 2^{111120012210021} is an apocalyptic number.

It is an amenable number.

111120012210021 is a deficient number, since it is larger than the sum of its proper divisors (37291281882843).

111120012210021 is a wasteful number, since it uses less digits than its factorization.

111120012210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602260.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111120012210021 its reverse (120012210021111), we get a palindrome (231132222231132).

It can be divided in two parts, 111 and 120012210021, that multiplied together give a palindrome (13321355312331).

The spelling of 111120012210021 in words is "one hundred eleven trillion, one hundred twenty billion, twelve million, two hundred ten thousand, twenty-one".