1101025138 has 4 divisors (see below), whose sum is σ = 1651537710. Its totient is φ = 550512568.

The previous prime is 1101025099. The next prime is 1101025153. The reversal of 1101025138 is 8315201011.

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., 997738569 + 103286569 = 31587^2 + 10163^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275256283 + ... + 275256286.

Almost surely, 2^1101025138 is an apocalyptic number.

1101025138 is a deficient number, since it is larger than the sum of its proper divisors (550512572).

1101025138 is an equidigital number, since it uses as much as digits as its factorization.

1101025138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550512571.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1101025138 is about 33181.6988413794. The cubic root of 1101025138 is about 1032.6006915189.

Adding to 1101025138 its reverse (8315201011), we get a palindrome (9416226149).

The spelling of 1101025138 in words is "one billion, one hundred one million, twenty-five thousand, one hundred thirty-eight".