111020997553 has 2 divisors, whose sum is σ = 111020997554. Its totient is φ = 111020997552.

The previous prime is 111020997517. The next prime is 111020997587. The reversal of 111020997553 is 355799020111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99346627249 + 11674370304 = 315193^2 + 108048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020997553 is a prime.

It is not a weakly prime, because it can be changed into another prime (111020997053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510498776 + 55510498777.

It is an arithmetic number, because the mean of its divisors is an integer number (55510498777).

Almost surely, 2^111020997553 is an apocalyptic number.

It is an amenable number.

111020997553 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020997553 is an equidigital number, since it uses as much as digits as its factorization.

111020997553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 43.

The spelling of 111020997553 in words is "one hundred eleven billion, twenty million, nine hundred ninety-seven thousand, five hundred fifty-three".