1012123201 has 4 divisors (see below), whose sum is σ = 1013877892. Its totient is φ = 1010368512.

The previous prime is 1012123199. The next prime is 1012123213. The reversal of 1012123201 is 1023212101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1023212101 = 17749 ⋅57649.

It can be written as a sum of positive squares in 2 ways, for example, as 809345601 + 202777600 = 28449^2 + 14240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012123201 - 2¹ = 1012123199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012123291) 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, 876480 + ... + 877633.

It is an arithmetic number, because the mean of its divisors is an integer number (253469473).

Almost surely, 2^1012123201 is an apocalyptic number.

It is an amenable number.

1012123201 is a deficient number, since it is larger than the sum of its proper divisors (1754691).

1012123201 is an equidigital number, since it uses as much as digits as its factorization.

1012123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754690.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1012123201 is about 31813.8837773699. The cubic root of 1012123201 is about 1004.0248458823.

Adding to 1012123201 its reverse (1023212101), we get a palindrome (2035335302).

Subtracting 1012123201 from its reverse (1023212101), we obtain a square (11088900 = 3330²).

The spelling of 1012123201 in words is "one billion, twelve million, one hundred twenty-three thousand, two hundred one".