1101512138 has 4 divisors (see below), whose sum is σ = 1652268210. Its totient is φ = 550756068.

The previous prime is 1101512129. The next prime is 1101512141. The reversal of 1101512138 is 8312151011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8312151011 = 631 ⋅13172981.

It can be written as a sum of positive squares in only one way, i.e., 710382409 + 391129729 = 26653^2 + 19777^2 .

It is a super-2 number, since 2×1101512138² = 2426657980322662088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275378033 + ... + 275378036.

Almost surely, 2^1101512138 is an apocalyptic number.

1101512138 is a deficient number, since it is larger than the sum of its proper divisors (550756072).

1101512138 is an equidigital number, since it uses as much as digits as its factorization.

1101512138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550756071.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 1101512138 is about 33189.0364126469. The cubic root of 1101512138 is about 1032.7529140233.

Adding to 1101512138 its reverse (8312151011), we get a palindrome (9413663149).

The spelling of 1101512138 in words is "one billion, one hundred one million, five hundred twelve thousand, one hundred thirty-eight".