1021231023 has 8 divisors (see below), whose sum is σ = 1369995648. Its totient is φ = 676643544.

The previous prime is 1021230997. The next prime is 1021231049. The reversal of 1021231023 is 3201321201.

It is an interprime number because it is at equal distance from previous prime (1021230997) and next prime (1021231049).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021231023 - 2¹⁰ = 1021229999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021230993 and 1021231011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021236023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1043715 + ... + 1044692.

It is an arithmetic number, because the mean of its divisors is an integer number (171249456).

Almost surely, 2^1021231023 is an apocalyptic number.

1021231023 is a deficient number, since it is larger than the sum of its proper divisors (348764625).

1021231023 is a wasteful number, since it uses less digits than its factorization.

1021231023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088573.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1021231023 is about 31956.7054465882. The cubic root of 1021231023 is about 1007.0275061377.

Adding to 1021231023 its reverse (3201321201), we get a palindrome (4222552224).

The spelling of 1021231023 in words is "one billion, twenty-one million, two hundred thirty-one thousand, twenty-three".