1020012123 has 8 divisors (see below), whose sum is σ = 1464632848. Its totient is φ = 627699744.

The previous prime is 1020012113. The next prime is 1020012139. The reversal of 1020012123 is 3212100201.

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

It is not a de Polignac number, because 1020012123 - 2⁴ = 1020012107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020012099 and 1020012108.

It is not an unprimeable number, because it can be changed into a prime (1020012113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13077040 + ... + 13077117.

It is an arithmetic number, because the mean of its divisors is an integer number (183079106).

Almost surely, 2^1020012123 is an apocalyptic number.

1020012123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020012123 is a deficient number, since it is larger than the sum of its proper divisors (444620725).

1020012123 is a wasteful number, since it uses less digits than its factorization.

1020012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26154173.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1020012123 is about 31937.6286377057. The cubic root of 1020012123 is about 1006.6266975466.

Adding to 1020012123 its reverse (3212100201), we get a palindrome (4232112324).

The spelling of 1020012123 in words is "one billion, twenty million, twelve thousand, one hundred twenty-three".