123201031 has 2 divisors, whose sum is σ = 123201032. Its totient is φ = 123201030.

The previous prime is 123201011. The next prime is 123201061. The reversal of 123201031 is 130102321.

It is a weak prime.

It is an emirp because it is prime and its reverse (130102321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123201031 - 2⁵ = 123200999 is a prime.

It is a super-2 number, since 2×123201031² = 30356988078925922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123201011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61600515 + 61600516.

It is an arithmetic number, because the mean of its divisors is an integer number (61600516).

Almost surely, 2^123201031 is an apocalyptic number.

123201031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123201031 is an equidigital number, since it uses as much as digits as its factorization.

123201031 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 13.

The square root of 123201031 is about 11099.5959836383. The cubic root of 123201031 is about 497.5897749658.

Adding to 123201031 its reverse (130102321), we get a palindrome (253303352).

The spelling of 123201031 in words is "one hundred twenty-three million, two hundred one thousand, thirty-one".