111221212122011 has 8 divisors (see below), whose sum is σ = 111238355289600. Its totient is φ = 111204069464488.

The previous prime is 111221212121969. The next prime is 111221212122071. The reversal of 111221212122011 is 110221212122111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111221212122011 - 2⁴⁶ = 40852467944347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221212122071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886875890 + ... + 887001288.

It is an arithmetic number, because the mean of its divisors is an integer number (13904794411200).

Almost surely, 2^{111221212122011} is an apocalyptic number.

111221212122011 is a deficient number, since it is larger than the sum of its proper divisors (17143167589).

111221212122011 is a wasteful number, since it uses less digits than its factorization.

111221212122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255033.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111221212122011 its reverse (110221212122111), we get a palindrome (221442424244122).

The spelling of 111221212122011 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, eleven".