111212221320011 has 32 divisors (see below), whose sum is σ = 129465818380800. Its totient is φ = 93555540368640.

The previous prime is 111212221319887. The next prime is 111212221320019. The reversal of 111212221320011 is 110023122212111.

It is a de Polignac number, because none of the positive numbers 2^k-111212221320011 is a prime.

It is a super-2 number, since 2×111212221320011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212221320019) 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, 947791616 + ... + 947908946.

It is an arithmetic number, because the mean of its divisors is an integer number (4045806824400).

Almost surely, 2^{111212221320011} is an apocalyptic number.

111212221320011 is a deficient number, since it is larger than the sum of its proper divisors (18253597060789).

111212221320011 is a wasteful number, since it uses less digits than its factorization.

111212221320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121139.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 111212221320011 its reverse (110023122212111), we get a palindrome (221235343532122).

The spelling of 111212221320011 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred twenty-one million, three hundred twenty thousand, eleven".