111100010972557 has 2 divisors, whose sum is σ = 111100010972558. Its totient is φ = 111100010972556.

The previous prime is 111100010972549. The next prime is 111100010972569. The reversal of 111100010972557 is 755279010001111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110979925159401 + 120085813156 = 10534701^2 + 346534^2 .

It is a cyclic number.

It is not a de Polignac number, because 111100010972557 - 2³ = 111100010972549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111100010972597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550005486278 + 55550005486279.

It is an arithmetic number, because the mean of its divisors is an integer number (55550005486279).

Almost surely, 2^{111100010972557} is an apocalyptic number.

It is an amenable number.

111100010972557 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100010972557 is an equidigital number, since it uses as much as digits as its factorization.

111100010972557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22050, while the sum is 40.

Adding to 111100010972557 its reverse (755279010001111), we get a palindrome (866379020973668).

The spelling of 111100010972557 in words is "one hundred eleven trillion, one hundred billion, ten million, nine hundred seventy-two thousand, five hundred fifty-seven".