1023121005 has 16 divisors (see below), whose sum is σ = 1660051584. Its totient is φ = 537978560.

The previous prime is 1023120977. The next prime is 1023121019. The reversal of 1023121005 is 5001213201.

It is not a de Polignac number, because 1023121005 - 2¹⁶ = 1023055469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479274 + ... + 481403.

It is an arithmetic number, because the mean of its divisors is an integer number (103753224).

Almost surely, 2^1023121005 is an apocalyptic number.

1023121005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1023121005 is a deficient number, since it is larger than the sum of its proper divisors (636930579).

1023121005 is an equidigital number, since it uses as much as digits as its factorization.

1023121005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960756.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1023121005 is about 31986.2627545013. The cubic root of 1023121005 is about 1007.6483551934.

Adding to 1023121005 its reverse (5001213201), we get a palindrome (6024334206).

The spelling of 1023121005 in words is "one billion, twenty-three million, one hundred twenty-one thousand, five".