111221131231331 has 16 divisors (see below), whose sum is σ = 122588011865088. Its totient is φ = 100063647456000.

The previous prime is 111221131231211. The next prime is 111221131231337. The reversal of 111221131231331 is 133132131122111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111221131231331 is a prime.

It is a super-2 number, since 2×111221131231331² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111221131231331.

It is not an unprimeable number, because it can be changed into a prime (111221131231337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24073046 + ... + 28318788.

It is an arithmetic number, because the mean of its divisors is an integer number (7661750741568).

Almost surely, 2^{111221131231331} is an apocalyptic number.

111221131231331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111221131231331 is a deficient number, since it is larger than the sum of its proper divisors (11366880633757).

111221131231331 is a wasteful number, since it uses less digits than its factorization.

111221131231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270402.

The product of its digits is 648, while the sum is 26.

Adding to 111221131231331 its reverse (133132131122111), we get a palindrome (244353262353442).

The spelling of 111221131231331 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-one thousand, three hundred thirty-one".