111120213541 has 2 divisors, whose sum is σ = 111120213542. Its totient is φ = 111120213540.

The previous prime is 111120213511. The next prime is 111120213569. The reversal of 111120213541 is 145312021111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110309672641 + 810540900 = 332129^2 + 28470^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120213541 - 2⁵ = 111120213509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111120213511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560106770 + 55560106771.

It is an arithmetic number, because the mean of its divisors is an integer number (55560106771).

Almost surely, 2^111120213541 is an apocalyptic number.

It is an amenable number.

111120213541 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120213541 is an equidigital number, since it uses as much as digits as its factorization.

111120213541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 111120213541 its reverse (145312021111), we get a palindrome (256432234652).

The spelling of 111120213541 in words is "one hundred eleven billion, one hundred twenty million, two hundred thirteen thousand, five hundred forty-one".