1023120101 has 4 divisors (see below), whose sum is σ = 1023660204. Its totient is φ = 1022580000.

The previous prime is 1023120053. The next prime is 1023120127. The reversal of 1023120101 is 1010213201.

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 264062500 + 759057601 = 16250^2 + 27551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023120101 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 (1023120701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267200 + ... + 271001.

It is an arithmetic number, because the mean of its divisors is an integer number (255915051).

Almost surely, 2^1023120101 is an apocalyptic number.

It is an amenable number.

1023120101 is a deficient number, since it is larger than the sum of its proper divisors (540103).

1023120101 is an equidigital number, since it uses as much as digits as its factorization.

1023120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540102.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1023120101 is about 31986.2486234319. The cubic root of 1023120101 is about 1007.6480584170.

Adding to 1023120101 its reverse (1010213201), we get a palindrome (2033333302).

The spelling of 1023120101 in words is "one billion, twenty-three million, one hundred twenty thousand, one hundred one".