1021420123 has 2 divisors, whose sum is σ = 1021420124. Its totient is φ = 1021420122.

The previous prime is 1021420117. The next prime is 1021420193. The reversal of 1021420123 is 3210241201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021420123 - 2⁵ = 1021420091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021420097 and 1021420106.

It is not a weakly prime, because it can be changed into another prime (1021420193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510710061 + 510710062.

It is an arithmetic number, because the mean of its divisors is an integer number (510710062).

Almost surely, 2^1021420123 is an apocalyptic number.

1021420123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021420123 is an equidigital number, since it uses as much as digits as its factorization.

1021420123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1021420123 is about 31959.6640001111. The cubic root of 1021420123 is about 1007.0896589528.

Adding to 1021420123 its reverse (3210241201), we get a palindrome (4231661324).

The spelling of 1021420123 in words is "one billion, twenty-one million, four hundred twenty thousand, one hundred twenty-three".