111002111557 has 2 divisors, whose sum is σ = 111002111558. Its totient is φ = 111002111556.

The previous prime is 111002111497. The next prime is 111002111579. The reversal of 111002111557 is 755111200111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72347012676 + 38655098881 = 268974^2 + 196609^2 .

It is a cyclic number.

It is not a de Polignac number, because 111002111557 - 2¹⁹ = 111001587269 is a prime.

It is a super-2 number, since 2×111002111557² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111002115557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55501055778 + 55501055779.

It is an arithmetic number, because the mean of its divisors is an integer number (55501055779).

Almost surely, 2^111002111557 is an apocalyptic number.

It is an amenable number.

111002111557 is a deficient number, since it is larger than the sum of its proper divisors (1).

111002111557 is an equidigital number, since it uses as much as digits as its factorization.

111002111557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 25.

Adding to 111002111557 its reverse (755111200111), we get a palindrome (866113311668).

The spelling of 111002111557 in words is "one hundred eleven billion, two million, one hundred eleven thousand, five hundred fifty-seven".