1232123101 has 4 divisors (see below), whose sum is σ = 1344134304. Its totient is φ = 1120111900.

The previous prime is 1232123069. The next prime is 1232123143. The reversal of 1232123101 is 1013212321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1013212321 = 11 ⋅92110211.

It is a cyclic number.

It is not a de Polignac number, because 1232123101 - 2⁵ = 1232123069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232127101) 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, 56005585 + ... + 56005606.

It is an arithmetic number, because the mean of its divisors is an integer number (336033576).

Almost surely, 2^1232123101 is an apocalyptic number.

1232123101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1232123101 is a deficient number, since it is larger than the sum of its proper divisors (112011203).

1232123101 is a wasteful number, since it uses less digits than its factorization.

1232123101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112011202.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1232123101 is about 35101.6110883817. The cubic root of 1232123101 is about 1072.0573863451.

Adding to 1232123101 its reverse (1013212321), we get a palindrome (2245335422).

The spelling of 1232123101 in words is "one billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred one".