111011220264421 has 2 divisors, whose sum is σ = 111011220264422. Its totient is φ = 111011220264420.

The previous prime is 111011220264419. The next prime is 111011220264433. The reversal of 111011220264421 is 124462022110111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102537799949025 + 8473420315396 = 10126095^2 + 2910914^2 .

It is a cyclic number.

It is not a de Polignac number, because 111011220264421 - 2¹ = 111011220264419 is a prime.

Together with 111011220264419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 111011220264421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111011220267421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505610132210 + 55505610132211.

It is an arithmetic number, because the mean of its divisors is an integer number (55505610132211).

Almost surely, 2^{111011220264421} is an apocalyptic number.

It is an amenable number.

111011220264421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011220264421 is an equidigital number, since it uses as much as digits as its factorization.

111011220264421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

Adding to 111011220264421 its reverse (124462022110111), we get a palindrome (235473242374532).

The spelling of 111011220264421 in words is "one hundred eleven trillion, eleven billion, two hundred twenty million, two hundred sixty-four thousand, four hundred twenty-one".