111021099688 has 8 divisors (see below), whose sum is σ = 208164561930. Its totient is φ = 55510549840.

The previous prime is 111021099667. The next prime is 111021099689. The reversal of 111021099688 is 886990120111.

It can be written as a sum of positive squares in only one way, i.e., 104573330884 + 6447768804 = 323378^2 + 80298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (111021099689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6938818723 + ... + 6938818738.

Almost surely, 2^111021099688 is an apocalyptic number.

It is an amenable number.

111021099688 is a deficient number, since it is larger than the sum of its proper divisors (97143462242).

111021099688 is a wasteful number, since it uses less digits than its factorization.

111021099688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13877637467 (or 13877637463 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 46.

The spelling of 111021099688 in words is "one hundred eleven billion, twenty-one million, ninety-nine thousand, six hundred eighty-eight".