1023213123 has 12 divisors (see below), whose sum is σ = 1492609248. Its totient is φ = 675387600.

The previous prime is 1023213101. The next prime is 1023213131. The reversal of 1023213123 is 3213123201.

It is a de Polignac number, because none of the positive numbers 2^k-1023213123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023213096 and 1023213105.

It is not an unprimeable number, because it can be changed into a prime (1023213173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561915 + ... + 563732.

It is an arithmetic number, because the mean of its divisors is an integer number (124384104).

Almost surely, 2^1023213123 is an apocalyptic number.

1023213123 is a deficient number, since it is larger than the sum of its proper divisors (469396125).

1023213123 is a wasteful number, since it uses less digits than its factorization.

1023213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125754 (or 1125751 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1023213123 is about 31987.7026840003. The cubic root of 1023213123 is about 1007.6785959192.

Adding to 1023213123 its reverse (3213123201), we get a palindrome (4236336324).

The spelling of 1023213123 in words is "one billion, twenty-three million, two hundred thirteen thousand, one hundred twenty-three".