1021103123 has 2 divisors, whose sum is σ = 1021103124. Its totient is φ = 1021103122.

The previous prime is 1021103119. The next prime is 1021103131. The reversal of 1021103123 is 3213011201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021103123 - 2² = 1021103119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021103098 and 1021103107.

It is not a weakly prime, because it can be changed into another prime (1021103723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510551561 + 510551562.

It is an arithmetic number, because the mean of its divisors is an integer number (510551562).

Almost surely, 2^1021103123 is an apocalyptic number.

1021103123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021103123 is an equidigital number, since it uses as much as digits as its factorization.

1021103123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1021103123 is about 31954.7042389693. The cubic root of 1021103123 is about 1006.9854640034.

Adding to 1021103123 its reverse (3213011201), we get a palindrome (4234114324).

The spelling of 1021103123 in words is "one billion, twenty-one million, one hundred three thousand, one hundred twenty-three".