123311440201 has 4 divisors (see below), whose sum is σ = 123312564100. Its totient is φ = 123310316304.

The previous prime is 123311440177. The next prime is 123311440271. The reversal of 123311440201 is 102044113321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71637057801 + 51674382400 = 267651^2 + 227320^2 .

It is a cyclic number.

It is not a de Polignac number, because 123311440201 - 2²¹ = 123309343049 is a prime.

It is a super-2 number, since 2×123311440201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123311440271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377106 + ... + 623563.

It is an arithmetic number, because the mean of its divisors is an integer number (30828141025).

Almost surely, 2^123311440201 is an apocalyptic number.

It is an amenable number.

123311440201 is a deficient number, since it is larger than the sum of its proper divisors (1123899).

123311440201 is a wasteful number, since it uses less digits than its factorization.

123311440201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123898.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 123311440201 its reverse (102044113321), we get a palindrome (225355553522).

The spelling of 123311440201 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred forty thousand, two hundred one".