133123011 has 32 divisors (see below), whose sum is σ = 212533248. Its totient is φ = 72468000.

The previous prime is 133123009. The next prime is 133123013. The reversal of 133123011 is 110321331.

It is an interprime number because it is at equal distance from previous prime (133123009) and next prime (133123013).

It is not a de Polignac number, because 133123011 - 2¹ = 133123009 is a prime.

It is a super-2 number, since 2×133123011² = 35443472115412242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133123013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176886 + ... + 177636.

It is an arithmetic number, because the mean of its divisors is an integer number (6641664).

Almost surely, 2^133123011 is an apocalyptic number.

133123011 is a deficient number, since it is larger than the sum of its proper divisors (79410237).

133123011 is a wasteful number, since it uses less digits than its factorization.

133123011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 133123011 is about 11537.8945653009. The cubic root of 133123011 is about 510.6041935834.

Adding to 133123011 its reverse (110321331), we get a palindrome (243444342).

It can be divided in two parts, 1331 and 23011, that added together give a palindrome (24342).

The spelling of 133123011 in words is "one hundred thirty-three million, one hundred twenty-three thousand, eleven".