111211225211321 has 4 divisors (see below), whose sum is σ = 111211347512100. Its totient is φ = 111211102910544.

The previous prime is 111211225211263. The next prime is 111211225211347. The reversal of 111211225211321 is 123112522112111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63735873075625 + 47475352135696 = 7983475^2 + 6890236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211225211321 is a prime.

It is a super-2 number, since 2×111211225211321² (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 (111211225210321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59776106 + ... + 61608483.

It is an arithmetic number, because the mean of its divisors is an integer number (27802836878025).

Almost surely, 2^{111211225211321} is an apocalyptic number.

It is an amenable number.

111211225211321 is a deficient number, since it is larger than the sum of its proper divisors (122300779).

111211225211321 is an equidigital number, since it uses as much as digits as its factorization.

111211225211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122300778.

The product of its digits is 480, while the sum is 26.

Adding to 111211225211321 its reverse (123112522112111), we get a palindrome (234323747323432).

The spelling of 111211225211321 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty-five million, two hundred eleven thousand, three hundred twenty-one".