1101111001138 has 4 divisors (see below), whose sum is σ = 1651666501710. Its totient is φ = 550555500568.

The previous prime is 1101111001099. The next prime is 1101111001139. The reversal of 1101111001138 is 8311001111011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 760179965689 + 340931035449 = 871883^2 + 583893^2 .

It is not an unprimeable number, because it can be changed into a prime (1101111001139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275277750283 + ... + 275277750286.

Almost surely, 2^{1101111001138} is an apocalyptic number.

1101111001138 is a deficient number, since it is larger than the sum of its proper divisors (550555500572).

1101111001138 is an equidigital number, since it uses as much as digits as its factorization.

1101111001138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550555500571.

The product of its (nonzero) digits is 24, while the sum is 19.

Adding to 1101111001138 its reverse (8311001111011), we get a palindrome (9412112112149).

The spelling of 1101111001138 in words is "one trillion, one hundred one billion, one hundred eleven million, one thousand, one hundred thirty-eight".