111221001211201 has 24 divisors (see below), whose sum is σ = 137510967876480. Its totient is φ = 89383347188352.

The previous prime is 111221001211181. The next prime is 111221001211211. The reversal of 111221001211201 is 102112100122111.

It is not a de Polignac number, because 111221001211201 - 2¹³ = 111221001203009 is a prime.

It is a super-2 number, since 2×111221001211201² (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 (111221001211211) 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, 253618581 + ... + 254056738.

It is an arithmetic number, because the mean of its divisors is an integer number (5729623661520).

Almost surely, 2^{111221001211201} is an apocalyptic number.

It is an amenable number.

111221001211201 is a deficient number, since it is larger than the sum of its proper divisors (26289966665279).

111221001211201 is a wasteful number, since it uses less digits than its factorization.

111221001211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507675613 (or 507675606 counting only the distinct ones).

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

Adding to 111221001211201 its reverse (102112100122111), we get a palindrome (213333101333312).

The spelling of 111221001211201 in words is "one hundred eleven trillion, two hundred twenty-one billion, one million, two hundred eleven thousand, two hundred one".