201131123 has 2 divisors, whose sum is σ = 201131124. Its totient is φ = 201131122.

The previous prime is 201131083. The next prime is 201131141. The reversal of 201131123 is 321131102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201131123 - 2¹⁰ = 201130099 is a prime.

It is a super-2 number, since 2×201131123² = 80907457278482258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201131098 and 201131107.

It is not a weakly prime, because it can be changed into another prime (201131423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100565561 + 100565562.

It is an arithmetic number, because the mean of its divisors is an integer number (100565562).

Almost surely, 2^201131123 is an apocalyptic number.

201131123 is a deficient number, since it is larger than the sum of its proper divisors (1).

201131123 is an equidigital number, since it uses as much as digits as its factorization.

201131123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 201131123 is about 14182.0704764854. The cubic root of 201131123 is about 585.9039503298.

Adding to 201131123 its reverse (321131102), we get a palindrome (522262225).

The spelling of 201131123 in words is "two hundred one million, one hundred thirty-one thousand, one hundred twenty-three".