1231010101 has 4 divisors (see below), whose sum is σ = 1245841632. Its totient is φ = 1216178572.

The previous prime is 1231010059. The next prime is 1231010129. The reversal of 1231010101 is 1010101321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231010101 - 2⁷ = 1231009973 is a prime.

It is a Duffinian number.

1231010101 is a modest number, since divided by 10101 gives 1231 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231010201) 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, 7415641 + ... + 7415806.

It is an arithmetic number, because the mean of its divisors is an integer number (311460408).

Almost surely, 2^1231010101 is an apocalyptic number.

It is an amenable number.

1231010101 is a deficient number, since it is larger than the sum of its proper divisors (14831531).

1231010101 is an equidigital number, since it uses as much as digits as its factorization.

1231010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14831530.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1231010101 is about 35085.7535333075. The cubic root of 1231010101 is about 1071.7344858897.

Adding to 1231010101 its reverse (1010101321), we get a palindrome (2241111422).

The spelling of 1231010101 in words is "one billion, two hundred thirty-one million, ten thousand, one hundred one".